Terms starting with B.

B. N. Rau

B. N. Rau is the constitutional adviser to the Constituent Assembly (1946) who prepared its first draft Constitution, drawing on comparative constitutional law from his study of the American, Irish, and other constitutions. He later served as India's delegate to the UN Security Council and as a judge of the International Court of Justice (1952-53). For UPSC, the key point is that the initial draft was Rau's work, on which Ambedkar's Drafting Committee then deliberated.

Example: His 1948 draft Constitution formed the working basis for the Drafting Committee chaired by B.R. Ambedkar.

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B. R. Ambedkar

B. R. Ambedkar (1891-1956) was the jurist, economist and social reformer who chaired the Drafting Committee of the Indian Constitution and led the struggle against caste oppression. His conversion to Buddhism and his demand for social democracy give the essayist the sharpest Indian voice on justice as the annihilation of caste. He is the canonical authority for essays on equality, dignity and constitutional morality.

Example: Ambedkar's chairmanship of the Constitution's Drafting Committee and his Annihilation of Caste (1936).

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B. V. Nagarathna

B. V. Nagarathna is a Supreme Court judge appointed in 2021 who is in line to become the first woman Chief Justice of India in 2027, for a brief tenure. Her elevation is the horizon of the women's representation story in the judiciary. She is the essay's forward-looking data point on judicial diversity.

Example: Justice B. V. Nagarathna's position in the seniority line for the first woman Chief Justice of India.

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B.G. Kher

B.G. Kher is the Congress leader and Constituent Assembly member who became the first Chief Minister of Bombay State (1947-52). Imprisoned during the Civil Disobedience and Quit India movements, he administered the large bilingual state through the early years of independence, including the linguistic reorganization debates. For UPSC, he represents the first generation of chief ministers who stabilized provincial administration after Partition.

Example: As Bombay's first chief minister he governed the bilingual state until its 1960 bifurcation into Maharashtra and Gujarat.

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B.N. Rau

Sir Benegal Narsing Rau was the Constitutional Adviser to the Constituent Assembly who prepared the first draft of the Constitution of India after studying several constitutions abroad. The Drafting Committee chaired by B.R. Ambedkar worked upon Rau's draft to produce the final text. He later served as a judge of the International Court of Justice at The Hague. For UPSC, Rau is the often-overlooked architect whose groundwork shaped the constitutional document.

Example: Rau toured the United States, Britain, Ireland and Canada in 1947 studying their constitutional systems.

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B.P. Singhal v. Union of India (2010) is

B.P. Singhal v. Union of India (2010) is the Supreme Court Constitution Bench judgment of 7 May 2010 on the removal of Governors. It held that under Article 156(1) the President may remove a Governor without assigning reasons, but the power cannot be exercised arbitrarily: a change of government at the Centre is not a valid ground, and removals are open to limited judicial review. For UPSC, it is the leading case on the Governor's tenure and Centre-state relations.

Example: The case arose from the UPA government's 2004 removal of the Governors of Uttar Pradesh, Gujarat, Haryana, and Goa appointed by the previous NDA regime.

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B.R. Ambedkar

B. R. Ambedkar (1891 to 1956) is the jurist and social reformer remembered as the principal architect of the Indian Constitution. As chairman of the Drafting Committee, he steered the Constitution through the Constituent Assembly, and as independent India's first Law Minister he piloted landmark social legislation. He led the Mahad Satyagraha (1927) and the temple-entry and anti-caste movements, and signed the Poona Pact (1932). For UPSC, he is central to constitutional history, social justice and the Dalit movement.

Example: His 1956 conversion to Buddhism at Nagpur, along with lakhs of followers, launched the Neo-Buddhist movement in India.

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B.R. Ambedkar (1891-1956)

B.R. Ambedkar (1891-1956) is the jurist and social reformer who chaired the Constituent Assembly's Drafting Committee and became independent India's first Law Minister. Born into a Mahar Dalit family, he led the Mahad Satyagraha of 1927, signed the Poona Pact of 1932, and embraced Buddhism with lakhs of followers at Nagpur on 14 October 1956. For UPSC, he is central to the Constitution, social justice, and the Dalit movement.

Example: The Mahad Satyagraha of March 1927 asserted the right of Dalits to draw water from the Chavdar tank.

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B.R. Ambedkar (subaltern perspective)

The subaltern perspective on B.R. Ambedkar reads him as the foundational voice of India's Dalit standpoint from below. He theorized caste as graded inequality, indicted the Hindu social order in Annihilation of Caste (1936), and treated constitutional morality, representation, and separate political organization as tools of emancipation. For UPSC, this lens contrasts with elite-nationalist historiography and grounds GS-1 answers on caste and social empowerment.

Example: His burning of the Manusmriti at Mahad in December 1927 symbolized the subaltern rejection of scriptural sanction for caste.

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Baba Amte

Baba Amte (1914 to 2008) is the social worker who devoted his life to the rehabilitation of leprosy patients and other marginalised groups. He founded Anandwan (Forest of Bliss) in 1949 near Warora, Maharashtra, as a self-sufficient community where cured patients lived and worked with dignity, and later led the Bharat Jodo marches for national unity. For UPSC, he exemplifies Gandhian constructive work and is frequently cited in ethics and social justice answers.

Example: He received the Ramon Magsaysay Award in 1985, the UN Human Rights Prize in 1988 and the Gandhi Peace Prize in 1999.

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Baba Farid's Punjabi kafis

The Punjabi kafis attributed to Baba Farid are devotional verses composed in the regional language of medieval Punjab, expressing Sufi ideals of humility, detachment from worldly pride, and longing for the divine. Written in the accessible kafi lyric form, they made mystical teaching available beyond Persian and Arabic, seeding the Punjabi literary tradition. For UPSC, they illustrate the Bhakti-Sufi synthesis and the growth of regional-language literature in the Sultanate period.

Example: Several salokas of Sheikh Farid included in the Guru Granth Sahib, preserving his Punjabi verses within the Sikh scriptural canon.

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Baba Fariduddin Ganjshakar

Baba Fariduddin Ganjshakar (1173-1266) was a Chishti Sufi saint who settled at Ajodhan (modern Pakpattan) in Punjab and became the most revered Sufi of the region in the 13th century. He preached love, service to the poor, and spiritual discipline in the local language, attracting followers across religious lines, and his verses entered the Guru Granth Sahib. For UPSC, he represents the Chishti order's role in Punjab's religious culture and the making of early Punjabi literature.

Example: His dargah at Pakpattan, which remains a major pilgrimage centre and the site of the annual urs commemorating the saint.

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Baba Ram Singh

Baba Ram Singh (1816-1885) was the founder of the Namdhari (Kuka) movement, a Sikh reform sect that preached strict moral discipline, boycotted British goods and institutions, and opposed cow slaughter in Punjab. After his followers attacked Malerkotla in 1872, the British deported him to Rangoon, where he died in captivity. For UPSC, the Kukas are counted among the earliest organised anti-British movements, prefiguring later nationalist boycott tactics.

Example: The Kuka attack on Malerkotla in January 1872, after which the colonial government deported Baba Ram Singh to Rangoon.

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Babita Puniya v. Union of India (2020)

Babita Puniya v. Union of India (2020) is the Supreme Court judgment holding that women Short Service Commission officers in the Army are entitled to Permanent Commission on par with men, calling the Army's resistance an expression of stereotype rather than operational necessity. It is the landmark case for gender parity in the armed forces. Essayists deploy it as proof that institutions, not women, needed to change.

Example: The Supreme Court's February 2020 ruling opening Permanent Commission to women Army officers.

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Back to the Vedas

Back to the Vedas was the rallying slogan of Swami Dayananda Saraswati, founder of the Arya Samaj in 1875, calling Hindus to return to the authority of the Vedas as the sole, infallible scripture. The slogan anchored his campaign against idol worship, priestly ritualism, caste by birth, and child marriage, demanding a rational, monotheistic Hinduism. For UPSC, it is the defining motto of the 19th century Hindu reform movement and a staple of modern Indian history questions.

Example: The Arya Samaj's rejection of idol worship and hereditary caste, justified by Dayananda as a return to Vedic purity.

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backed by about Rs 1,612 crore for tribal enterprise and value-addition

This phrase points to the Pradhan Mantri Jan Jatiya Vikas Mission (PMJVM), which was approved with a budget of about Rs 1,612 crore over five years to drive livelihood-based tribal development. Implemented by TRIFED, it backs tribal enterprise and value-addition through more than 3,800 Van Dhan Vikas Kendras that procure minor forest produce at MSP and build market linkages. It is a ready-made GS-2 and GS-3 data point on tribal welfare schemes.

Example: Pradhan Mantri Jan Jatiya Vikas Mission (PMJVM)

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Backing

Backing means the support, guarantee, or authority standing behind a policy, institution, claim, or financial instrument. In UPSC contexts it usually denotes government or institutional support for a scheme, the reserves or assets supporting a currency or guarantee, or the evidence underpinning an assertion. The word signals that something does not stand alone but rests on a stated foundation of power, resources, or proof, which is why exam questions probe what actually provides the backing.

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backlash

Backlash is the strong negative public or political reaction against a policy, reform or social change. In the UPSC context it describes resistance to liberalisation, land acquisition or gender reforms, for example. Understanding backlash helps analyse why good policies stall, a useful angle in GS-2 governance and GS-3 economy answers on reform implementation.

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backward-class politics

Backward-class politics is the assertion of Other Backward Classes in Indian electoral and policy life, transformed by the implementation of the Mandal Commission's 27 per cent OBC reservation in central government jobs in 1990. It shifted power toward OBC-led parties and made caste-based social justice a permanent axis of Indian politics. For UPSC, it is essential to GS2 polity and GS1 society questions.

Example: The rise of OBC-led regional parties in Uttar Pradesh and Bihar through the 1990s, which reshaped North Indian electoral competition.

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Bad loans

Bad loans, called non-performing assets (NPAs) in banking terminology, are loans on which the borrower has failed to pay interest or instalments for more than 90 days, as classified under RBI norms. Accumulated NPAs erode bank capital, freeze fresh lending, and produced India's twin balance sheet problem of stressed banks and over-leveraged firms. For UPSC, they anchor questions on banking reform, the RBI's Asset Quality Review, and the Insolvency and Bankruptcy Code of 2016 as the resolution mechanism.

Example: The RBI's Asset Quality Review of 2015, which forced public sector banks to recognise previously hidden stressed loans as NPAs.

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Badami

Badami, ancient Vatapi, was the capital of the early Chalukyas from the 6th century, founded by Pulakeshin I, and is famed for its four rock-cut cave temples carved into red sandstone cliffs. Three caves are Brahmanical (Shaiva and Vaishnava) and one is Jain, marking the formative phase of Dravida rock architecture. For UPSC, Badami is the type-site for early Chalukyan art and a standard prelims question on Deccan temple architecture.

Example: Cave 3 at Badami, a Vaishnava cave dated to 578 CE with a celebrated standing Vishnu, among the earliest dated sculptures of the Deccan.

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Badami, Aihole

Badami and Aihole are the paired art centres of the early Chalukyas (6th-8th centuries) in Karnataka, together tracing the evolution of Indian temple architecture. Badami supplied the capital and its rock-cut caves, while Aihole, called the cradle of Indian temple architecture, hosts experimental structural temples and the Meguti inscription, the court poet Ravikirti's eulogy of Pulakeshin II dated 634 CE. For UPSC, the pair is the classic prelims question on Chalukyan art and epigraphy.

Example: The Aihole inscription of 634 CE, composed by Ravikirti, which records Pulakeshin II's victory over Harshavardhana.

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Badshahi Mosque at Lahore

The Badshahi Mosque at Lahore is the great congregational mosque commissioned by the Mughal emperor Aurangzeb and completed in 1673, built in red sandstone with white marble inlay. Among the largest mosques of its era, it could accommodate tens of thousands of worshippers and exemplifies mature Mughal imperial architecture. For UPSC, it is a key monument question on late Mughal building activity and Indo-Islamic architecture.

Example: Its vast courtyard, designed to hold the Eid congregations of Lahore, which made it the ceremonial religious centre of the Mughal Punjab.

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BAG

BAG is a mnemonic for NITI Aayog's design: Bottom-up planning, an Advisory role with no funds to disburse, and a Governing Council of chief ministers, contrasted with the Planning Commission as TAF (Top-down, Allocated funds, Five-year plans). It captures the shift from centralized plan allocation to cooperative federalism after 2015. For UPSC, it is a quick revision hook for the NITI versus Planning Commission comparison in GS-3.

Example: The site's economy article pairs BAG for NITI Aayog with TAF for the Planning Commission to contrast bottom-up advisory planning with top-down fund allocation.

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Bagh caves

The Bagh caves are a group of nine Buddhist rock-cut caves in Dhar district, Madhya Pradesh, excavated in the 5th-6th centuries CE during the Gupta period. Though architecturally modest, they are celebrated for their surviving mural paintings, especially in Cave 4 (Rangmahal), which rank among the finest examples of ancient Indian painting alongside Ajanta. For UPSC, the Bagh caves are a staple GS-1 art and culture prelims fact on Gupta-era Buddhist art.

Example: The Rangmahal (Cave 4) murals

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bagh nakh

Bagh nakh, or wagh nakh, is the iron 'tiger claw' weapon shaped like curved claws worn on the fingers, famously used by Chhatrapati Shivaji to kill the Bijapur general Afzal Khan at Pratapgad in 1659. The episode, following which the Marathas routed the Adil Shahi army, is a landmark of Maratha history and a recurring UPSC prelims question on Shivaji's military tactics.

Example: Shivaji's killing of Afzal Khan at Pratapgad (1659)

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Baghor

Baghor is an Upper Palaeolithic site in Sidhi district, Madhya Pradesh, in the Son valley, excavated in 1980 under G. R. Sharma and J. Desmond Clark. It yielded a rich microlithic blade industry and, at its centre, a circular stone platform holding a naturally triangular sandstone marked with concentric triangles, interpreted as one of the world's earliest shrines, possibly to the mother goddess. For UPSC, Baghor is the textbook site for prehistoric ritual behaviour in Indian archaeology.

Example: The Baghor stone shrine, a triangular sandstone with etched concentric triangles set within a ring of stones, still echoed in local folk worship of the mother goddess.

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Baghpat under the peasant leader Shah Mal

During the Revolt of 1857, the Baghpat-Baraut region of western Uttar Pradesh rose under Shah Mal, a Jat peasant leader who mobilised village cultivators against British revenue demands and moneylenders. His followers cut telegraph lines, blocked roads, attacked government offices, and ran a parallel peasant administration until he was killed in battle in July 1857. For UPSC, Shah Mal exemplifies the revolt's popular peasant dimension beyond the sepoys and princes.

Example: Shah Mal's disruption of British communications and supply lines between Delhi and Meerut, which hampered the colonial response in the Doab.

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Bagor (Rajasthan)

Bagor is one of India's largest Mesolithic sites, located on the Kothari river in Bhilwara district, Rajasthan, and excavated by V. N. Misra between 1967 and 1970. Its deep stratified deposits yielded geometric microliths, evidence of early animal domestication, and burials, documenting the transition from hunting-gathering toward settled life around 5000 BCE. For UPSC, Bagor is the standard Mesolithic type-site of Rajasthan in ancient history.

Example: The 1967-70 excavations by V. N. Misra, which exposed successive Mesolithic occupation layers with microlithic tools and human burials.

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Bahadur Shah II

Bahadur Shah II (1775-1862), called Bahadur Shah Zafar, was the last Mughal emperor, reigning from 1837 to 1857 as a pensioner of the British with authority confined to the Red Fort. The rebels of 1857 proclaimed him their nominal emperor, and after the revolt's suppression the British tried him, deposed him, and exiled him to Rangoon, where he died in 1862. For UPSC, he personifies the formal end of Mughal rule and the symbolic leadership of 1857.

Example: His trial at the Red Fort in 1858 and subsequent exile to Rangoon, which formally extinguished the Mughal dynasty.

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Bahadur Shah II's exile to Rangoon

After the suppression of the 1857 Revolt, the British captured Bahadur Shah II at Humayun's tomb, tried him for treason at the Red Fort, and in 1858 exiled him with his family to Rangoon in Burma. He lived there as a state prisoner until his death in November 1862 and was buried in an unmarked grave, ending the Mughal imperial line. For UPSC, the exile is the closing episode of 1857 and a symbol of colonial retribution.

Example: His grave in Yangon (Rangoon), later identified and enclosed as a memorial, which remains a site of remembrance for the last Mughal.

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Bahadur Shah of Gujarat

Bahadur Shah (r. 1526-1537) was the most powerful Sultan of Gujarat, who extended his control over Malwa and challenged both the Mughals and the Portuguese. He clashed with Humayun, who occupied Gujarat in 1535, and with the Portuguese over Diu, dying in 1537 during a confrontation with the Portuguese. For UPSC, his reign illustrates the triangular contest among the Gujarat Sultanate, the early Mughals, and European sea power on the western coast.

Example: His wars with the Portuguese around Diu, culminating in his death in 1537 during negotiations that turned violent.

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Bahishkrit Hitakarini Sabha

The Bahishkrit Hitakarini Sabha (Depressed Classes Welfare Association) was founded by Dr. B. R. Ambedkar in Bombay in July 1924 to promote education, employment, and social dignity among the depressed classes. It ran hostels, libraries, and reading rooms, spread awareness of legal rights, and became the organisational seedbed of Ambedkar's later political movement. For UPSC, it marks the institutional beginning of Ambedkar's public career and the Dalit movement.

Example: The hostels and reading rooms it established in Bombay, which gave depressed-class students access to education and a shared political consciousness.

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Bahlul Lodi

Bahlul Lodi (r. 1451-1489) was an Afghan noble of the Lodi tribe who seized the Delhi throne and founded the Lodi dynasty, the last dynasty of the Delhi Sultanate. He consolidated Afghan power in the Doab and in 1479 annexed the Sharqi kingdom of Jaunpur, restoring much of the Sultanate's former territory. For UPSC, he represents the Afghan phase of the Sultanate and the transition toward the centralised administration later perfected by Sikandar Lodi.

Example: His annexation of Jaunpur in 1479, which ended the independent Sharqi Sultanate and reunited the eastern Gangetic plain under Delhi.

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Bahman-Nama

The Bahman-Nama is a Persian epic poem of about 9,500 lines composed around 1092-1108 by Iranshah ibn Abi al-Khair in the style of Ferdowsi's Shahnama. It narrates the adventures of Kay Bahman, son of Isfandiyar of the Kayanid dynasty, and was written partly as counsel for its Seljuk patron amid ceaseless warfare. For UPSC, it exemplifies the post-Shahnama Persian epic tradition whose literary culture later flowed into Indo-Persian court literature.

Example: Safavid-era illustrated folios of the Bahman-Nama, such as the dragon-slaying scene of Azar Barzin, which were sometimes interpolated into Shahnama manuscripts.

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Bahmani kingdom

The Bahmani kingdom denotes the Deccan Sultanate ruled by the Bahmani dynasty from Gulbarga and later Bidar between 1347 and 1527, famed for its Persianate court culture, administrative experiments, and ministers such as Mahmud Gawan, who founded a celebrated madrasa at Bidar. It patronised a distinctive Indo-Islamic architecture blending Persian and Deccan idioms. For UPSC, the kingdom is studied for its polity, its wars with Vijayanagara, and its cultural synthesis.

Example: Mahmud Gawan's madrasa at Bidar, a centre of learning whose ruins still display the glazed-tile decoration of Bahmani architecture.

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Bahmani Sultanate

The Bahmani Sultanate (1347-1527) was the first major independent Muslim kingdom of the Deccan, founded by Ala-ud-din Bahman Shah (Hasan Gangu) at Gulbarga after rebelling against Muhammad bin Tughlaq. Its capital later moved to Bidar, it fought prolonged wars with Vijayanagara, and it eventually fragmented into the five Deccan sultanates. For UPSC, it is the foundation chapter of Deccan medieval history and Indo-Persian culture in the south.

Example: Its breakup into the five successor states of Ahmadnagar, Bijapur, Golconda, Berar, and Bidar, which dominated Deccan politics through the 16th century.

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Bahmani tombs at Ashtur

The Bahmani tombs at Ashtur, near Bidar in Karnataka, are the domed mausolea of the later Bahmani sultans, built in the distinctive Deccan Indo-Islamic style with massive domes, arched facades, and Persian-inspired tilework. They mark the dynasty's shift of its capital and necropolis to Bidar in the 15th century. For UPSC, Ashtur is a key monument question on Bahmani funerary architecture and Deccan Sultanate art.

Example: The tomb of Ahmad Shah al-Wali at Ashtur, whose lofty dome and decorative stonework typify the mature Bahmani style.

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Bahram Shah

Bahram Shah (r. 1240-1242) was the third son of Iltutmish to occupy the Delhi throne, placed there by the Chihalgani, the corps of forty Turkish nobles, after they deposed Razia Sultan. A weak ruler dominated by the very nobles who elevated him, he was murdered in 1242 during a conflict with the Turkish oligarchy. For UPSC, his reign illustrates the factional instability of the early Mamluk Sultanate between Iltutmish and Balban.

Example: His assassination in 1242 at the hands of the Turkish nobles, who then raised Ala-ud-din Masud Shah to the throne.

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Bahubali (Gommateshwara) statue at Shravanabelagola

The Gommateshwara statue at Shravanabelagola, Karnataka, is a 57-foot monolithic image of the Jain tirthankara-figure Bahubali, carved from a single granite block in 983 CE on the orders of Chamundaraya, minister of the Ganga king. Depicting Bahubali in deep meditation with vines curling around his limbs, it is among the largest free-standing stone sculptures in the world. For UPSC, it is the iconic monument of Karnataka's Jain heritage and medieval sculpture.

Example: The Mahamastakabhisheka, the ritual anointing of the statue held every twelve years, which draws lakhs of Jain pilgrims.

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Bahujan Samaj Party

The Bahujan Samaj Party is a national political party founded in 1984 by Kanshi Ram to mobilise Dalits, Other Backward Classes, religious minorities, and other disadvantaged groups, whom he termed the bahujan samaj. Led to prominence by Mayawati, who became Chief Minister of Uttar Pradesh, it uses the elephant as its election symbol. For UPSC, the BSP is the central case study of Dalit assertion and identity-based party formation in post-independence politics.

Example: Mayawati's government in Uttar Pradesh in 2007, when the BSP won an outright majority on a broadened social coalition.

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Bairam Khan

Bairam Khan is the Mughal commander and statesman who served as regent for the young Akbar from 1556 to 1560 after Humayun's death. As Khan-i-Khanan he consolidated Mughal authority in North India and directed the Mughal victory over Hemu at the Second Battle of Panipat (1556). Dismissed in 1560, he was assassinated in Gujarat in 1561 while travelling toward Mecca. For UPSC, his regency explains how Akbar's empire survived its fragile early years.

Example: His son, Abdul Rahim Khan-i-Khana, became one of Akbar's Navaratnas and a celebrated Hindi poet.

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Baji Rao I

Baji Rao I (r. 1720-1740) was the Peshwa who transformed the Maratha polity into an expansionist power, carrying Maratha arms into Malwa, Bundelkhand, and toward Delhi during the decline of Mughal authority. A brilliant cavalry strategist, he defeated the Nizam at Palkhed in 1728 and laid the foundations of Maratha dominance in central India. For UPSC, he is the archetypal empire-builder of the Maratha confederacy's expansion phase.

Example: The Battle of Palkhed in 1728, where Baji Rao's mobile cavalry encircled and forced the Nizam to terms without a pitched battle.

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Bajirao II

Bajirao II (r. 1796-1818) was the last Peshwa, whose weak and faction-ridden rule invited British intervention. After defeat by Holkar at Poona, he signed the Treaty of Bassein in 1802, accepting British subsidiary alliance protection, and after the Third Anglo-Maratha War he surrendered in 1818 and was exiled to Bithur on a British pension. For UPSC, his career marks the formal end of the Peshwa institution and Maratha independence.

Example: The Treaty of Bassein of 1802, by which the Peshwa accepted a British subsidiary force at Poona and effectively surrendered Maratha sovereignty.

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Bajrang

Bajrang here refers to the Bajrang Dal, the youth organisation founded in 1984 as the militant youth wing of the Vishva Hindu Parishad. Organised in local units across India, it mobilises young volunteers for religious processions, cow-protection campaigns, and social service activities, and has frequently figured in public-order controversies. For UPSC, it is studied under the theme of religious organisations and their role in contemporary Indian politics and communal mobilisation.

Example: Its founding in 1984 as the Vishva Hindu Parishad's youth wing, created to provide volunteers for religious and social campaigns.

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bakhshi

Bakhshi, or Mir Bakhshi, was the Mughal Empire's military paymaster and head of the army department, ranking among the four principal central ministers alongside the wazir, the sadr-us-sudur and the mir saman. He supervised recruitment, maintained the mansabdari rolls and kept the muster of horses. The office matters for UPSC medieval-history questions on Mughal central administration.

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Bakhtiyar Khalji's sack of Nalanda (c. 1200 CE)

The sack of Nalanda is the destruction of the great Buddhist university of Nalanda by the forces of Bakhtiyar Khalji, a Turkic general serving the Ghurids, around the turn of the 13th century (conventionally dated about 1193 CE). Nalanda was then the foremost centre of Buddhist learning in Asia, with a vast library, hostels and hundreds of resident monks. Its burning is traditionally treated as the final collapse of institutional Buddhism in eastern India, a landmark in art and culture studies.

Example: The Tibetan pilgrim Dharmasvamin, visiting around 1234, found monks still living amid Nalanda's ruins, showing the destruction was partial but terminal.

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Bakshi Jagabandhu Bidyadhar

Bakshi Jagabandhu Bidyadhar was the commander (Bakshi) of the forces of Khurda in Odisha who led the Paika Rebellion of 1817 against British rule. The Paikas were a hereditary military peasantry, and their rising erupted after the East India Company's revenue settlements displaced them from their lands and service tenures. It is treated as one of the earliest organised armed uprisings against the British before 1857.

Example: In March 1817 the Paikas attacked Company establishments in Khurda, spreading the revolt across Puri and Cuttack.

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Baku Adaptation Roadmap

The Baku Adaptation Roadmap is the work programme launched at COP29 to advance implementation of Article 7 of the Paris Agreement on adaptation, including support for Least Developed Countries to implement National Adaptation Plans. It matters because adaptation had pledges without a delivery track comparable to mitigation.

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Bal Gangadhar Tilak

Bal Gangadhar Tilak (1856-1920) was an Extremist leader of the Indian National Congress who argued that self-rule was the only remedy for India's problems. He coined the slogan 'Swaraj is my birthright and I shall have it', built a mass base through festivals and the press, and faced repeated sedition trials for his writings. Tilak is central to the story of the Congress's Extremist phase and the Home Rule movement.

Example: In 1893 he converted the Ganesh festival into a public celebration to build Hindu mass mobilisation.

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Bal Swaraj

Bal Swaraj is an online portal of the National Commission for Protection of Child Rights for real-time tracking and monitoring of children in need of care and protection. It has two components: COVID Care, for children who lost one or both parents to COVID-19 or otherwise after March 2020, and CiSS, for children in street situations, tracking their rescue and rehabilitation. Developed under the Supreme Court's directions, it exemplifies technology-enabled child protection.

Example: District officers upload case details so the Commission can verify that each child receives due entitlements.

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Bal Vatikas

Bal Vatikas are preparatory preschool classes introduced under the National Education Policy 2020 for children aged five to six before they enter Grade 1. They belong to the foundational stage of the 5+3+3+4 school structure and emphasise play-based, activity-based learning to ensure school readiness. Kendriya Vidyalayas and other schools have opened Balvatika sections across the country. They illustrate NEP 2020's new focus on early childhood care and education.

Example: NCERT's Jadui Pitara play-based material supports teaching in Balvatika classrooms.

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Bala

BALA is the acronym for Building as Learning Aid, an initiative supported by UNICEF that treats the physical school building itself as a teaching tool. Floors, walls, pillars, windows, corridors and outdoor spaces are designed with learning aids such as number grids, maps, alphabets and science illustrations. For UPSC it illustrates innovative elementary education pedagogy, where infrastructure doubles as a continuous, child-friendly learning resource.

Example: Elementary schools built under Sarva Shiksha Abhiyan have used BALA designs, with painted walls functioning as daily learning aids.

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Bala-vana

'Bala-vana' is not a standard UPSC term with an established definition. 'Bala' is the Sanskrit word for child or strength, and 'vana' means forest, but the combined form 'Bala-vana' appears here as a truncated fragment rather than a recognized concept. It carries no standalone meaning in the Indian polity, history, geography or economy syllabus, so it should not be memorized as a distinct term.

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Balaji Baji Rao

Balaji Baji Rao (Nana Saheb) was the Peshwa of the Maratha Empire from 1740 to 1761, succeeding his father Baji Rao I. Under him Maratha power reached its greatest territorial extent, stretching from the Deccan into the Punjab, though administration grew increasingly dependent on Maratha sardars. His reign is studied as the peak and turning point of the Maratha Empire, ending with the crushing defeat at Panipat.

Example: The Third Battle of Panipat, fought on 14 January 1761 against Ahmad Shah Abdali, destroyed the Maratha army and ended his reign.

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Balaji Vishwanath

Balaji Vishwanath was the first Peshwa of the Maratha Empire, serving Shahu from 1713 until his death in 1720. He stabilized Shahu's position after Aurangzeb's death by outmanoeuvring the rival claimant Tarabai and secured Mughal recognition of Maratha claims. He matters because he transformed the Peshwaship into the de facto executive office of the Maratha state, founding the Bhat family line that produced Baji Rao I.

Example: The 1719 Mughal sanads granting the Marathas Chauth and Sardeshmukhi rights were secured during his tenure.

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Balakot

Balakot is a town in Pakistan's Khyber Pakhtunkhwa province that became famous after the Indian Air Force struck a Jaish-e-Mohammed training camp there on 26 February 2019. The strike was India's response to the Pulwama terror attack of 14 February 2019 and marked the first cross-border air strike by India since 1971. It is a recurring example of India's post-Uri counter-terrorism doctrine and strategic signaling.

Example: The 26 February 2019 airstrike targeted a Jaish-e-Mohammed training facility in Balakot, the first Indian air strike across the LoC since 1971.

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balance of power

Balance of power is the international-relations principle that no single state should become strong enough to dominate others, with equilibrium maintained through alliances, arms build-ups and diplomacy. Kautilya's mandala theory is its Indian precursor. For UPSC it frames GS-2 answers on multipolarity, the Indo-Pacific, and India's strategic autonomy between rival power blocs.

Example: the Cold War bipolar order

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Balance of Power

The balance of power is the doctrine that international peace is preserved when no single state or alliance can dominate the others, maintained through shifting alliances and armaments. It governed European diplomacy from Westphalia to 1914 and still frames alliance analysis in GS-2.

Example: The Congress of Vienna of 1815 is its classic construction.

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balance-of-payments crisis

A balance-of-payments crisis occurs when a country cannot finance its imports and external debt because its foreign-exchange reserves are nearly exhausted. India faced one in 1991, when reserves covered barely three weeks of imports, forcing gold pledging, an IMF loan and the landmark liberalisation reforms. It is the defining GS-3 case study on why India opened its economy.

Example: India's 1991 economic reforms

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balance-of-payments crisis in 1957

The balance-of-payments crisis in 1957 struck during the Second Five Year Plan's Mahalanobis push for heavy industrialisation, when capital-goods imports surged and the current account deficit crossed Rs 290 crore, draining foreign-exchange reserves. Instead of devaluing, India imposed quantitative import restrictions, a 'de facto devaluation' that began decades of the licence-permit regime. It is a classic UPSC economy question.

Example: the Second Five Year Plan (1956-61)

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Balban

Ghiyasuddin Balban was the Sultan of Delhi from 1266 to 1287, the most powerful ruler of the Ilbari (Slave) dynasty after Iltutmish. He restored central authority by crushing rebellious nobles and the Turkic 'Chihalgani' corps, kept the Mongols out of the northwest, and exalted the monarchy with strict court ritual. Balban is the classic example of the theory of kingship in the Delhi Sultanate, ruling as Zil-i-Ilahi, the 'Shadow of God'.

Example: He adopted the title Zil-i-Ilahi and enforced rigid court etiquette, including prostration (sijda) before the Sultan.

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Bali

Bali is an island province of Indonesia in the Lesser Sunda group, the only province of that country with a Hindu majority. Its culture preserves a distinctive blend of Hinduism with local traditions in its temples, festivals and the Subak irrigation system. Bali matters for UPSC as a symbol of India's historical civilizational links with Southeast Asia and of Hinduism's spread through ancient maritime trade.

Example: The Pura Besakih temple complex on Mount Agung is Bali's most important Hindu shrine.

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Ballia (UP)

Ballia is a district in eastern Uttar Pradesh, on the border with Bihar, formed as a district in 1879. It is best known in the freedom movement as a centre of the Quit India Movement, where local leaders set up a parallel administration in August 1942. For UPSC it is a standard example of a 'parallel government' during the Quit India Movement, alongside Satara and Midnapore.

Example: Under Chittu Pandey, Ballia ran its own parallel government for several days during the 1942 Quit India uprising.

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Balwantrai Mehta Committee

The Balwantrai Mehta Committee was appointed by the Government of India in 1957 to examine the working of the Community Development Programme and the National Extension Service. It found these programmes lacked local participation and recommended 'democratic decentralisation' through a three-tier Panchayati Raj system: Gram Panchayat at the village, Panchayat Samiti at the block, and Zila Parishad at the district level. It is the founding committee of Panchayati Raj in India.

Example: Rajasthan became the first state to inaugurate Panchayati Raj at Nagaur on 2 October 1959.

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BAMCEF

BAMCEF is the All India Backward and Minority Communities Employees Federation, founded in 1978 by Kanshi Ram to organize educated SC, ST, OBC, and minority government employees. It built the cadre, funds, and ideological network that launched the Dalit Shoshit Samaj Sangharsh Samiti (1981) and the Bahujan Samaj Party (1984). For UPSC, it is the organizational root of the Bahujan political movement in North India.

Example: BAMCEF's network of government employees became the cadre base from which Kanshi Ram launched the BSP in 1984.

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Banabhatta

Banabhatta was the seventh-century court poet of Harshavardhana, author of the Harshacharita, a Sanskrit prose biography of his patron and one of the earliest historical biographies in Indian literature, and of the unfinished romantic novel Kadambari (completed by his son). His works are indispensable primary sources for Harsha's reign and seventh-century court life, which is why UPSC ancient-history questions cite him alongside Xuanzang.

Example: the Harshacharita, which records Harsha's campaigns and his patronage of Nalanda, making it a core source for the Pushyabhuti dynasty

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Banawali

Banawali is a Harappan archaeological site in Fatehabad district, Haryana, excavated by R. S. Bisht. It shows a fortified town with planned streets, mud-brick houses, and evidence of both pre-Harappan and Mature Harappan occupation. Banawali is significant for GS-1 art and culture as one of the few sites where the full transition from the Early to the Mature Harappan phase can be studied.

Example: Terracotta models of ploughs found at Banawali are evidence of plough agriculture in the Harappan period.

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bandagan

The bandagan are the corps of military slaves who formed the elite core of the Delhi Sultanate's army and administration. Purchased as boys, trained in arms and administration, and personally loyal to the Sultan, they rose to high office and even the throne. For UPSC, they illustrate the Sultanate's Turkish slave-aristocracy and its mechanism of social mobility.

Example: Iltutmish and Balban both began as bandagan before becoming Sultans of Delhi, showing how slavery could lead to kingship.

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Bande Nawaz Gesu Daraz's

Gesu Daraz (Bande Nawaz, c. 1321-1422) was a Chishti Sufi saint and the chief khalifa of Nasiruddin Chiragh Dehlavi in Delhi. After Timur's invasion he migrated south and settled at Gulbarga in the Bahmani kingdom, where he established the Chishti presence in the Deccan. His long Persian and Dakhani writings matter for medieval history and the spread of Sufism and the Dakhani language.

Example: His dargah at Gulbarga, Karnataka, remains one of the most important Sufi pilgrimage centres in the Deccan.

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Bandung Conference

The Bandung Conference is the April 1955 meeting of 29 Asian and African states at Bandung, Indonesia, hosted by President Sukarno. It brought together newly independent nations to assert a collective voice against colonialism and Cold War bloc politics, producing the Ten Principles (Dasasila Bandung) of peaceful coexistence. For UPSC, Bandung is the direct precursor of the Non-Aligned Movement, formally founded at Belgrade in 1961.

Example: Jawaharlal Nehru attended the conference, and its emphasis on principles close to Panchsheel shaped India's early foreign policy of non-alignment.

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Bandung Conference (1955)

The Bandung Conference of 1955 is the meeting of 29 Asian and African states in Indonesia that proclaimed Afro-Asian solidarity and non-alignment between the Cold War blocs. Nehru, Nasser and Sukarno were its leading figures; it prepared the Non-Aligned Movement of 1961.

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bangla roof

Bangla roof is the curved, sloping roof form derived from Bengal's thatched bamboo huts, where the do-chala (two-slope) roof dips in the middle and rises at the eaves. Shah Jahan adopted it for Mughal imperial pavilions at Agra and Delhi, and it crowns the terracotta temples of Bengal. It shows how vernacular forms entered imperial architecture, a valued UPSC art-and-culture insight.

Example: the jor-bangla temples of Bishnupur, West Bengal

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Bangladesh Nationalist Party

The Bangladesh Nationalist Party (BNP) is a major political party of Bangladesh founded by President Ziaur Rahman in September 1978. It promoted Bangladeshi nationalism as an alternative to the Awami League's Bengali nationalism and has alternated in power with the Awami League since democracy was restored in 1991. For UPSC it is relevant to India-Bangladesh relations, since BNP governments have historically been seen as cooler toward India than Awami League ones.

Example: BNP chairperson Khaleda Zia became Bangladesh's first woman prime minister in 1991.

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Bangladesh war (December 1971)

The Bangladesh war of December 1971 was the armed conflict between India and Pakistan from 3 to 16 December 1971, fought after months of Pakistani atrocities against Bengalis in East Pakistan and the resulting refugee crisis. India supported the Mukti Bahini's liberation struggle, and the war ended with Pakistan's surrender at Dhaka and the creation of Bangladesh. It is the keystone event for India-Pakistan relations, humanitarian intervention debates and military history.

Example: On 16 December 1971, 93,000 Pakistani troops surrendered at Dhaka, the largest military surrender since the Second World War.

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Bani Thani

Bani Thani is a celebrated Rajasthani miniature painting of Kishangarh, painted around 1760 by the court artist Nihal Chand. It depicts a court singer and poet, reputedly the lover of King Savant Singh (Nagaridas), idealized as Radha with elongated eyes and an arched brow. Bani Thani is the signature image of the Kishangarh school and a standard GS-1 example of Rajasthani miniature painting.

Example: The original Bani Thani portrait (c. 1760) by Nihal Chand shows the Kishangarh style's elegant, stylized faces.

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banjar

Banjar is a land-revenue classification for barren, uncultivable wasteland that yields no regular crop. In Akbar's zabti assessment, land was graded as polaj, parauti, chachar and banjar to fix revenue rates, with banjar charged the least. The term appears in UPSC medieval-history questions on Mughal agrarian administration and in discussions of wasteland reclamation today.

Example: Akbar's land classification (Ain-i-Akbari)

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Bank nationalisation

Bank nationalisation is the policy by which the Government of India took over private commercial banks, beginning in 1969 and followed by a second round in 1980. It brought banking under state direction with the goals of expanding rural branches, curbing concentration of credit, and financing agriculture and small industry under priority sector lending. For UPSC it is the landmark of Indian banking history, linked to financial inclusion and the public sector banking system.

Example: In 1969 the government nationalised 14 major commercial banks, and in 1980 six more, creating India's public sector banking structure.

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Bank nationalisation (July 1969)

The bank nationalisation of July 1969 was the Government of India's takeover of 14 major private commercial banks with deposits over Rs 50 crore, carried out by Ordinance on 19 July 1969 under Prime Minister Indira Gandhi. The stated aim was to align credit with national priorities such as agriculture and small industry rather than big business. It is a milestone in economic history, marking the state's entry into commercial banking and the start of social banking.

Example: The 19 July 1969 Ordinance nationalised banks like Punjab National Bank and Canara Bank, extending banking to rural India.

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bank rate

The bank rate is the rate at which the Reserve Bank of India buys or rediscounts bills of exchange and other commercial paper from banks, in effect the RBI's long-term lending rate. Unlike the collateralised and short-term repo rate, the bank rate is a penal, longer-term rate that moves with the Marginal Standing Facility rate. For UPSC, it is a quantitative monetary tool, and its distinction from the repo rate is a classic prelims question.

Example: In June 2025 the RBI cut the repo rate to 5.5 percent, with the bank rate corridor moving in step.

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Bank rate

Bank rate is the rate at which the Reserve Bank of India buys or rediscounts bills of exchange and other commercial paper from banks, effectively the RBI's long-term lending rate. Unlike the repo rate, which is collateralised and short-term, the Bank Rate is a penal, longer-term rate and moves in line with the Marginal Standing Facility rate. For UPSC, it is a quantitative monetary tool, and its distinction from the repo rate is a classic prelims question.

Example: In June 2025 the RBI cut the repo rate to 5.5 percent and CRR to 3 percent in a pro-growth move, with the Bank Rate corridor moving in step with the MSF rate.

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bank recapitalisation

Bank recapitalisation is the infusion of fresh capital by the government into public-sector banks to meet Basel capital-adequacy norms and absorb losses from bad loans. India's big 2017 recapitalisation plan of Rs 2.11 lakh crore, funded largely through recapitalisation bonds, aimed to revive lending after the NPA crisis. It is a standard UPSC GS-3 topic on banking reform and fiscal policy.

Example: the 2017 bank recapitalisation plan (Rs 2.11 lakh crore)

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Bank runs

A bank run is the sudden withdrawal of deposits by a large number of a bank's customers at the same time, driven by fear that the bank is insolvent. Because banks keep only a fraction of deposits as reserves, even a healthy bank can fail if a run forces distress sales of assets. Bank runs are studied in GS-3 as the classic example of financial contagion and the reason for deposit insurance and lender-of-last-resort facilities.

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banker to banks

Banker to banks is the Reserve Bank of India's role as the banker for all scheduled commercial banks: it maintains their cash reserve balances, provides refinance and short-term liquidity, and regulates their functioning under the RBI Act, 1934. The role gives the central bank control over money supply and financial stability, and is a direct UPSC prelims question on RBI functions.

Example: the Reserve Bank of India

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banker to banks / lender of last resort

This phrase combines the RBI's two core banking roles: as banker to banks it holds banks' reserves and settles their payments, and as lender of last resort it provides emergency liquidity to solvent banks facing a panic, in the spirit of Bagehot's rule of lending freely against good collateral. Both functions anchor financial stability and are staple UPSC prelims and GS-3 facts.

Example: the Reserve Bank of India

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banker to the government

Banker to the government is the Reserve Bank of India's statutory function of managing the banking business of the central and state governments under the RBI Act, 1934. The RBI maintains their accounts, receives and pays money on their behalf, and manages public debt. For UPSC economy, it is one of the RBI's core functions alongside currency issue and monetary policy.

Example: The RBI conducts the central government's market borrowing programme through auctions of dated securities.

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Banking Service Commission

The Banking Service Commission was conceived as a UPSC-like statutory body for recruiting officers to public sector banks. The 1975 Act creating it was repealed in 1978 before it could function, and Banking Service Recruitment Boards handled hiring instead; a revived Commission under the 1984 Act was wound up by the 2003 repeal. Recruitment is now done by individual banks, with the Institute of Banking Personnel Selection conducting common examinations. It is a UPSC case study in institutional churn.

Example: IBPS's Common Recruitment Process now fills probationary officer and clerk posts in public sector banks.

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Banking Service Commission (Repeal) Bill

The Banking Service Commission (Repeal) Bill, 2002, enacted in 2003, repealed the Banking Service Commission Act, 1984 and abolished the Banking Service Recruitment Boards. The government argued that consolidation and computerisation had reduced manpower needs and that banks should frame their own recruitment strategies with board approval, while continuing reservation for SCs, STs and OBCs. It decentralised public sector bank recruitment and is cited in banking-reform questions.

Example: After the repeal, banks increasingly adopted the IBPS common written examination for hiring.

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Banking stress

Banking stress is the condition in which a bank or the banking system faces pressure on asset quality, profitability, liquidity or capital adequacy, often reflected in rising non-performing assets. It can force credit contraction, raise borrowing costs and slow growth, and may require government recapitalisation. For UPSC it is the central concept behind India's NPA problem and the reforms under the Insolvency and Bankruptcy Code and bank mergers.

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banks

Banks are financial institutions that accept deposits and extend credit, and in the UPSC context the term usually means India's scheduled commercial banks regulated by the RBI. Nationalisation in 1969 and 1980, priority-sector lending and financial inclusion drives define their story. Banking structure, NPAs and reforms are perennial GS-3 topics and rich sources of prelims questions.

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banned private trade and the acceptance of gifts

Banned private trade and the acceptance of gifts is the Cornwallis reform that ended corruption in the East India Company's covenanted civil service. Cornwallis barred officials from private trade and taking gifts, and compensated them with higher, fixed salaries, creating an honest bureaucracy. For UPSC, it marks the foundation of the modern Indian civil service ethos under the Cornwallis Code of 1793.

Example: Lord Cornwallis, Cornwallis Code, 1793

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Banqiao dam

The Banqiao dam failure of 1975 in China's Henan province, when a typhoon's extreme rain collapsed the dam and 61 others, killed an estimated 171,000 people. It is the world's deadliest dam disaster.

Example: Banqiao is the global benchmark for catastrophic dam failure

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Bar Council

The Bar Council of India is the statutory regulator of the legal profession and legal education under the Advocates Act, 1961. It prescribes standards for law colleges, recognises law degrees, conducts the All India Bar Examination for enrolment, and exercises disciplinary jurisdiction over advocates together with the state bar councils. It features in UPSC questions on professional regulation and legal-education reform.

Example: Only advocates who clear the All India Bar Examination receive the certificate of practice.

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Bara Lacha-La

Bara Lacha-La is a high mountain pass in Himachal Pradesh connecting the Lahaul valley with Ladakh. It lies on the Manali-Leh highway (NH-3), one of India's two strategic road axes to Ladakh. For UPSC geography it is a standard Himalayan pass, significant for connectivity, border logistics and as part of the headwaters of the Bhaga river.

Example: The pass is a key transit point on the Manali-Leh road, used for military and civilian movement to Ladakh.

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Barabar caves

The Barabar caves are rock-cut caves in Gaya district, Bihar, commissioned by the Mauryan emperor Ashoka in the 3rd century BCE for Ajivika ascetics. They are the earliest surviving rock-cut architecture in India, with highly polished interiors and the famous Lomas Rishi cave with a chaitya-arch facade. They matter for GS-1 as the origin point of Indian rock-cut architecture and evidence of Ashoka's patronage of non-Buddhist sects.

Example: The Lomas Rishi cave at Barabar carries an Ashokan inscription and imitates wooden architecture in stone.

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Barbosa

Duarte Barbosa (c. 1480-1521) was a Portuguese traveller and interpreter who served in India in the early 16th century and wrote 'The Book of Duarte Barbosa', an account of the lands and trade of the Indian Ocean. His detailed description of the Vijayanagara Empire, its markets, temples and administration is one of the most important foreign sources on the empire. For UPSC he is a standard foreign traveller source for medieval South India.

Example: Barbosa's account describes the bustling markets and prosperity of Vijayanagara in the early 1500s.

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BARC

The Bhabha Atomic Research Centre (BARC) is India's premier nuclear research institution, functioning under the Department of Atomic Energy and headquartered at Trombay in Mumbai. Established in 1954 as the Atomic Energy Establishment, Trombay, it was renamed in 1967 in memory of Homi J. Bhabha, the founder of India's nuclear programme. BARC designs India's indigenous pressurised heavy water reactors, conducts research across nuclear science and its applications, and is the technical backbone of India's three-stage nuclear power programme.

Example: BARC designed the 220 MWe Indian pressurised heavy water reactor (IPHWR) line operating at several Indian nuclear power stations.

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Bardoli resolution

The Bardoli resolution was the decision of the Congress Working Committee, meeting at Bardoli on 12 February 1922, to suspend the Non-Cooperation Movement after the Chauri Chaura violence of 5 February 1922. Gandhi insisted that the movement be withdrawn because it had turned violent, a decision that disillusioned many young nationalists. It is a landmark debate point on Gandhi's methods and the limits of non-violence.

Example: The resolution followed the Chauri Chaura incident, in which a mob killed 22 policemen.

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Bardoli Satyagraha

The Bardoli Satyagraha was the 1928 peasant movement in Bardoli taluka, Gujarat, led by Vallabhbhai Patel against a 30 percent increase in land revenue. Patel organized a disciplined no-tax campaign that forced the government to reduce the assessment and return confiscated land. It matters as the agitation that earned Patel the title 'Sardar' and demonstrated disciplined peasant mobilization before the Civil Disobedience Movement.

Example: After the 1928 settlement, Gandhi conferred on Vallabhbhai Patel the title 'Sardar' for his leadership at Bardoli.

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Bareilly

Bareilly is a city in western Uttar Pradesh, historically the capital of the Rohilkhand region ruled by the Rohilla chiefs. During the Revolt of 1857 it was a major centre of the uprising under Khan Bahadur Khan, who proclaimed an independent administration there. For UPSC, Bareilly is remembered as a key 1857 centre in the Rohilkhand-Rohilla heartland.

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Bareilly under Khan Bahadur

Khan Bahadur Khan was the grandson of Hafiz Rahmat Khan and the leader of the 1857 Revolt at Bareilly, where he was proclaimed Nawab of Rohilkhand and set up a parallel administration. He organized the Rohilla resistance until British forces under Colin Campbell retook Bareilly in May 1858. His leadership makes Bareilly-Rohilkhand a standard case study of the 1857 revolt outside Awadh and Delhi.

Example: After his capture in the Nepal Terai, Khan Bahadur Khan was tried and hanged in February 1860.

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barely any rust

Barely any rust describes the remarkable corrosion resistance of the Iron Pillar of Delhi, which has stood in the open for about 1,600 years without rusting away. Its phosphorus-rich wrought iron formed a protective crystalline film, a triumph of ancient Indian metallurgy. For UPSC prelims, it is the standard example of Gupta-era scientific and technological achievement.

Example: Iron Pillar of Delhi, inscription of king Chandra (Chandragupta II), 5th century CE

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barid

Barid is the intelligence officer of the Delhi Sultanate administration. The Barid-i-Mumalik headed the state's intelligence and news system, with local barids and reporters (munhiyan) sending regular reports on all happenings in the realm to the Sultan. Only a noble enjoying the Sultan's full confidence was appointed chief barid. For UPSC, it belongs with the Sultanate's administrative offices like the diwan-i-wizarat and diwan-i-arz.

Example: Barid-i-Mumalik under the Delhi Sultanate (1206-1526)

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barids

The barids are the intelligence officers and spies of the Delhi Sultanate who reported directly to the Sultan on nobles, officials and markets. Alauddin Khalji systematised them as part of his market-control regime, using their reports to enforce price regulations and check corruption. For UPSC, they show how the Sultanate built an information network to sustain centralised economic control.

Example: Barids monitored grain merchants in Delhi to ensure compliance with Alauddin's fixed prices during shortages.

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Barin Ghosh

Barindra Kumar Ghosh (Barin Ghosh, 1880-1959) was a Bengali revolutionary and younger brother of Aurobindo Ghosh, who co-founded the Jugantar group and edited its mouthpiece to propagate armed revolution against British rule. He was a central accused in the Alipore Conspiracy Case of 1908 following the Muzaffarpur bombing attempt. Barin Ghosh is a key figure in the early revolutionary terrorism phase of the freedom movement.

Example: In the Alipore Conspiracy Case (1908), his death sentence was commuted to transportation for life in the Andamans.

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barley (yava)

Barley (yava) is the main crop of the Rig Vedic period, named in the Rig Veda as yava. Rig Vedic agriculture was limited, with pastoralism and cattle raids dominating the economy, but barley cultivation around settlements anchored the shift toward settled life. For UPSC prelims, it is a favourite fact: in the Rig Vedic age, barley was the staple crop, while wheat and rice came later.

Example: Rig Veda, where yava denotes barley

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Barrackpore on 29 March 1857

Barrackpore, on 29 March 1857, was the cantonment near Calcutta where Mangal Pandey of the 34th Bengal Native Infantry attacked his British officers, an act treated as the first spark of the 1857 Revolt. Pandey was disarmed, court-martialled and hanged on 8 April 1857. The incident is a standard prelims fact: the date, the place and the regiment number are all frequently asked.

Example: Mangal Pandey fired on Lieutenant Baugh at Barrackpore on 29 March 1857 and was hanged on 8 April.

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Barren Island

Barren Island is India's only active volcano, located in the Andaman Sea about 140 km from Port Blair. Its eruptions are effusive basaltic activity that poses little threat to inhabited areas.

Example: Barren Island has erupted repeatedly in recent years, lighting up the Andaman Sea

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barrier reefs

Barrier reefs are coral reef formations that run parallel to a coastline but are separated from it by a deep lagoon. They form where coral grows outward from a subsiding shoreline, leaving a navigable channel between reef and land. For UPSC geography prelims, know the three reef types (fringing, barrier, atoll) and the world's largest barrier reef system.

Example: Great Barrier Reef off Queensland, Australia

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barter with cattle as the standard of wealth

Barter with cattle as the standard of wealth describes the Rig Vedic economy, where cattle were the chief measure of wealth and medium of exchange before coinage existed. Wars were fought as cattle raids (gavishti), and rich men were called gopati. For UPSC, it captures the pastoral, pre-monetary character of the Early Vedic age and contrasts with the later agricultural, urban economy.

Example: Rig Vedic society, where nishka gold ornaments also circulated as prestige wealth

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Basavanna

Basavanna (1134-1196) was the twelfth-century minister of the Kalachuri king Bijjala II who founded the Virashaiva (Lingayat) movement, preaching devotion to Shiva, the dignity of labour, and the rejection of caste, ritual, and gender barriers through his Kannada vachanas. He established the Anubhava Mantapa at Kalyana as an open spiritual parliament of saints, workers, and women. UPSC treats him as the archetypal bhakti social reformer.

Example: the Anubhava Mantapa he founded at Kalyana, a gathering of saints, artisans and women that debated spiritual and social questions

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base effect

Base effect is the statistical effect in which a low base in the previous period makes the current growth rate look artificially high, or a high base makes it look low, even when absolute performance is unchanged. Economists adjust for it to avoid misreading data. For UPSC, it explains headline GDP and inflation spikes, such as high growth rates recorded after a pandemic-era contraction.

Example: India's GDP growth in FY22 (8.7%) following the FY21 contraction of 5.8%

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base year

Base year is the reference year whose prices or quantities serve as the benchmark for an index number series such as GDP, wholesale prices, or industrial production. Changing the base year updates weights to reflect the current structure of the economy. For UPSC economy questions, know India's base years: 2011-12 for GDP and IIP, and 2012 for CPI.

Example: 2011-12, the base year for India's GDP series

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Base-year alert

Base-year alert is a caution applied in UPSC answers and data interpretation: when the base year of an index or series changes, growth rates and comparisons across periods can mislead. India's GDP series, for example, moved from the 2004-05 base to 2011-12, altering measured growth. It reminds aspirants to check the base year before comparing statistics across time, a standard habit for economy data questions.

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base-year prices

Base-year prices are the prices prevailing in the base year, used to value output when computing real GDP. Valuing current output at constant base-year prices removes the effect of inflation, so growth reflects real changes in production rather than rising prices. For UPSC, this is the core of the nominal versus real GDP distinction asked in prelims.

Example: India's real GDP measured at 2011-12 constant prices

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Basel Committee principles

The UN Convention against Corruption, adopted in Merida in 2003, is the global anti-corruption treaty covering prevention, criminalisation and asset recovery. India ratified it in 2011. It matters because asset recovery provisions let India pursue laundered wealth parked abroad.

Example: Asset-recovery requests for fugitive economic offenders

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Basel Convention (1989)

The Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and their Disposal is an international treaty adopted in 1989 and in force since 1992 to reduce the movement of hazardous waste between countries. It requires prior informed consent of the importing country before hazardous waste can be shipped, and obliges parties to minimise waste generation and manage it in an environmentally sound manner. India is a party to the convention, and it is frequently cited in questions on hazardous and electronic waste trade.

Example: Shipments of electronic waste from developed countries to developing countries are regulated under the convention's prior informed consent procedure.

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Baseline

Baseline is the starting reference point or benchmark against which change is measured, whether a year's production, a policy's initial indicators, or an index's base value. Progress, targets and impact assessments are all computed relative to the baseline. For UPSC answers it is a standard evaluation term: every scheme appraisal begins by fixing a baseline to measure outcomes against.

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Baseline Resilience Indicators for Communities

Baseline Resilience Indicators for Communities is a framework for measuring a community's starting resilience across social, economic, institutional and infrastructural dimensions, so progress can be tracked.

Example: BRIC-style baselines let a district measure whether its resilience is improving year on year

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Baseload power

Baseload power is the minimum level of electricity demand on a grid over a given period, the continuous load that must be supplied around the clock regardless of the time of day. Baseload power plants, such as nuclear and coal plants, run continuously at high capacity factors to meet this constant demand, in contrast to peaking plants that ramp up only during high-demand hours. The concept is central to debates on integrating intermittent renewables, since solar and wind cannot by themselves guarantee round-the-clock baseload without storage or backup.

Example: A nuclear reactor operating at over 90 percent capacity factor provides steady baseload power, complementing solar and wind generation which varies with weather.

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Basic Animal Husbandry Statistics

Basic Animal Husbandry Statistics is the annual publication of the Animal Husbandry Department reporting milk, egg, meat and wool production. It is the source for headline figures like India's world-leading milk output and per-capita availability. For UPSC it is the go-to data reference for allied-sector questions.

Example: Its report of record milk production each year anchors White Revolution progress claims.

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Basic Exchange and Cooperation Agreement

The Basic Exchange and Cooperation Agreement (BECA) is the India-US geospatial cooperation pact signed on 27 October 2020 during the third 2+2 Ministerial Dialogue. It allows India access to US geospatial intelligence, including maps, nautical and aeronautical charts and satellite data, improving the accuracy of missiles and navigation. BECA was the last of the four US foundational defence agreements, following LEMOA (2016) and COMCASA (2018).

Example: BECA was signed alongside the 2020 India-US 2+2 dialogue, completing the set of US foundational defence pacts.

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basic structure

The basic structure is the set of core features of the Constitution that Parliament cannot alter even through the amending power of Article 368, as held by the Supreme Court in Kesavananda Bharati v. State of Kerala (1973). It includes features like the supremacy of the Constitution, republican and democratic government, secularism, separation of powers, federalism, and judicial review. It is the most tested doctrine in Indian polity, shaping every debate on constitutional amendments.

Example: In Minerva Mills (1980) the Court struck down clauses of the 42nd Amendment for damaging the basic structure.

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basic structure doctrine

Basic structure doctrine is the constitutional principle laid down in Kesavananda Bharati (1973) that Parliament may amend the Constitution under Article 368 but cannot destroy its basic structure. Features like supremacy of the Constitution, rule of law, judicial review, and federalism are beyond amendment. For UPSC mains, it is the central doctrine in any answer on the balance between Parliament's amending power and constitutional limits.

Example: Kesavananda Bharati v. State of Kerala, Supreme Court, 1973

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basic-structure

Basic-structure is the hyphenated form of the doctrine that limits Parliament’s amending power under Article 368. It holds that while Parliament can amend any part of the Constitution, it cannot destroy or damage its basic structure, a principle laid down in Kesavananda Bharati (1973). Courts have since read features like rule of law, free and fair elections, and judicial review into it. For UPSC it is the anchor concept for questions on amendment limits and judicial review.

Example: The Supreme Court used the basic-structure test to invalidate the NJAC in 2015 for undermining judicial independence.

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basic-structure doctrine

The basic-structure doctrine is the judge made rule that Parliament’s power to amend the Constitution does not extend to altering its basic structure. Evolved in Kesavananda Bharati v. State of Kerala (1973) by a 13 judge bench, it overruled the unlimited amendment view and has since been applied in cases like Minerva Mills (1980) and Waman Rao. UPSC treats it as the centrepiece of constitutional law, linking parliamentary sovereignty with judicial review.

Example: Waman Rao (1981) applied the doctrine by holding that amendments after April 1973 placing laws in the Ninth Schedule are open to basic-structure review.

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Basis

In UPSC answers, 'basis' means the foundation on which a claim, policy, or classification rests: the constitutional basis (e.g., Article 16 for reservations), the evidentiary basis (Census data), or the ethical basis (constitutional morality). Mains answers gain marks by stating the basis explicitly before arguing. Examiners also probe whether schemes have a sound fiscal or legal basis, so the word signals reasoning, not description.

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Basohli-Kullu

Basohli-Kullu refers to the Basohli school of Pahari miniature painting and its Kullu offshoots, among the earliest centres of Pahari art. Basohli developed under Raja Kirpal Pal around 1678-1695 with bold primary colours, expressive faces and beetle-wing emerald effects, and the style spread to Kullu where local variants arose. It is significant as the first Pahari school, preceding the refined Kangra style, and Basohli painting received a GI tag.

Example: The Shangri Ramayana series, painted at Kullu around 1680-1688, shows the Basohli style's influence in the Kullu valley.

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Baswan Committee

The Baswan Committee, headed by former civil servant B.S. Baswan, was constituted by the UPSC in 2015 to review the civil services examination, covering the upper age limit, number of attempts and the examination pattern. It submitted its report in 2016, but the government never made the report or its recommendations public. The committee is frequently invoked in debates on reforming the examination's age and attempt limits.

Example: Media reports suggested it examined lowering the general-category upper age limit from 32 years.

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battery

A battery is a device that stores chemical energy and converts it into electrical energy on demand through electrochemical reactions. Primary batteries are single-use and non-rechargeable, while secondary batteries can be recharged many times, and modern lithium-ion secondary batteries dominate portable electronics, electric vehicles and grid-scale storage. Batteries are the linchpin of the energy transition and digital infrastructure, and India promotes domestic manufacturing through production-linked incentive schemes for advanced chemistry cells.

Example: Lithium-ion battery packs power electric two-wheelers and store solar power for nighttime use.

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Battle of Britain

The Battle of Britain was the 1940 aerial campaign in which the Royal Air Force defeated the German Luftwaffe's attempt to destroy British air power before an invasion. Germany's failure forced Hitler to abandon Operation Sea Lion and marked the first major German defeat of the Second World War. It is the standard example of air power deciding a campaign and of civilian morale under bombing.

Example: Churchill's tribute, 'Never was so much owed by so many to so few,' honoured the RAF pilots of this battle.

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Battle of Chandawar

The Battle of Chandawar was the 1194 battle in which Muhammad of Ghor defeated Jaichand (Jayachandra), the Gahadavala ruler of Kannauj, on the Yamuna near modern Etawah. Jaichand fell in the fight, and Ghurid forces occupied Kannauj and Varanasi. For UPSC it matters as the second blow, after Tarain (1192), that broke major Rajput resistance and opened the Gangetic plain to the Ghurids, paving the way for the Delhi Sultanate.

Example: After Chandawar, Ghurid commanders consolidated control over the Doab and the Ganga valley, which Qutb-ud-din Aibak then held as the base of the future Delhi Sultanate.

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Battle of Gettysburg

The Battle of Gettysburg was the July 1 to 3, 1863 battle of the American Civil War in which Union forces under George Meade repelled Robert E. Lee's Confederate invasion of Pennsylvania, climaxing in the failed Pickett's Charge on Cemetery Ridge. With roughly 50,000 casualties it was the war's bloodiest battle. For UPSC it matters as the conflict's turning point, ending Lee's last offensive in the North, shortly before Lincoln's Gettysburg Address.

Example: On July 3, 1863, some 12,500 Confederate troops advanced across open ground in Pickett's Charge and were cut down, breaking the assault and forcing Lee's retreat south.

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Battle of Ghaghra

The Battle of Ghaghra is the 1529 battle in which Babur defeated the Afghan chiefs under Mahmud Lodi and the forces of Sultan Nusrat Shah of Bengal near the Ghaghra river in Bihar. Fought partly as an amphibious engagement across the river, it was the last of Babur's three great Indian battles after Panipat (1526) and Khanwa (1527), completing Mughal supremacy in the Gangetic plain. For UPSC, it closes the Babur triad in GS-1 medieval history.

Example: Babur's 1529 campaign, his third great Indian battle

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Battle of Haldighati

The Battle of Haldighati was fought on June 18, 1576, when Rana Pratap of Mewar faced Akbar's Mughal army under Raja Man Singh at the Haldighati pass near Gogunda in Rajasthan. Outnumbered, Pratap fought fiercely but lost the field and escaped on his horse Chetak, continuing guerrilla resistance from the hills. For UPSC it matters as the symbol of Rajput resistance to Mughal expansion and a staple of medieval Indian history questions.

Example: After the battle Rana Pratap regrouped in the Aravalli hills and recaptured much of Mewar except Chittor, keeping Mewar's independence alive.

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Battle of Jutland in 1916

The Battle of Jutland was the May 31 to June 1, 1916 clash between Britain's Grand Fleet under Jellicoe and Germany's High Seas Fleet under Scheer off Denmark's Jutland peninsula, the only full-scale battleship engagement of World War I. Britain lost more ships, but Germany retreated to port and never again seriously challenged the blockade. For UPSC it matters as the decisive naval event of WWI, showing how command of the sea sustained Britain's economic blockade of Germany.

Example: The German fleet stayed in harbour for the rest of the war, so the British blockade held unbroken until the 1918 armistice.

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Battle of Leipzig in October 1813

The Battle of Leipzig was the October 16 to 19, 1813 battle in which a coalition of Russia, Prussia, Austria and Sweden defeated Napoleon near Leipzig, Germany. With some 600,000 combatants it was the largest European battle before World War I and is called the Battle of the Nations. For UPSC it matters as the blow that ended French domination of Germany and forced Napoleon's first abdication in 1814.

Example: The German nationalist enthusiasm the victory sparked fed the 19th-century unification movement that Bismarck later completed.

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Battle of Midway (June 1942)

The Battle of Midway was the June 4 to 7, 1942 naval battle in which the United States decisively defeated Japan in the Pacific, sinking four Japanese fleet carriers (Akagi, Kaga, Soryu, Hiryu) while losing one. US cryptanalysts had decoded Japanese plans, letting Admiral Nimitz ambush the fleet. For UPSC it matters as the turning point of the Pacific War in World War II, ending Japan's offensive momentum six months after Pearl Harbor.

Example: US Navy codebreakers at Station HYPO, led by Joseph Rochefort, read Japanese signals well enough to predict the attack on Midway itself.

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Battle of Plassey

The Battle of Plassey was fought on June 23, 1757, when Robert Clive's East India Company force defeated Siraj-ud-daulah, the Nawab of Bengal, largely because the Nawab's commander Mir Jafar defected mid-battle. Clive installed Mir Jafar as a puppet Nawab. For UPSC it matters as the battle that gave the British political control of Bengal's revenues, the true foundation of the British Empire in India, ahead of Buxar (1764).

Example: Mir Jafar's treachery made 'Mir Jafar' a lasting byword for betrayal in Indian political vocabulary.

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Battle of Saraighat

The Battle of Saraighat was the 1671 naval battle on the Brahmaputra near Guwahati in which Ahom forces under Lachit Borphukan defeated the Mughal fleet and army under Ram Singh. Using knowledge of the river's channels and guerrilla tactics, the outnumbered Ahoms ended Mughal ambitions in Assam. For UPSC it matters as a landmark of indigenous military resistance and is linked to Lachit Borphukan, celebrated annually in Assam.

Example: Despite being gravely ill, Lachit Borphukan took personal command from his boat and rallied the Ahom fleet to victory.

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Battle of Stalingrad

The Battle of Stalingrad (1942-43) is the Soviet victory over the German Sixth Army on the Volga, the turning point of the Second World War in Europe. The encirclement and surrender of Paulus's army destroyed the aura of German invincibility.

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Battle of Swally in 1612

The Battle of Swally was the November 29 to 30, 1612 naval engagement in which Captain Thomas Best's English East India Company ships defeated a Portuguese fleet off Suvali near Surat. The victory impressed the Mughal authorities and helped the English obtain trading rights and a factory at Surat in 1613. For UPSC it matters as the event that broke the Portuguese monopoly and marked the start of the English East India Company's ascent in India.

Example: The Surat factory of 1613 became the Company's first permanent settlement in Mughal India, predating Sir Thomas Roe's 1615 embassy to Jahangir.

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Battle of Talikota

The Battle of Talikota was fought on January 23, 1565, when an alliance of the Deccan Sultanates (Bijapur, Ahmadnagar, Golconda and Bidar) defeated the Vijayanagara army under Aliya Rama Raya. Rama Raya was captured and executed, and the capital city was sacked and abandoned. For UPSC it matters as the conventional end point of Vijayanagara's imperial phase, reshaping Deccan politics and enabling the sultanates' expansion.

Example: Hampi's ruins, now a UNESCO World Heritage site, still bear marks of the sack that followed the battle.

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Battle of Ten Kings

The Battle of Ten Kings was the Rigvedic battle celebrated in the Dasarajna hymn (Rigveda 7.18), in which Sudas of the Bharata tribe defeated a confederacy of ten tribes and kings on the banks of the Parushni (Ravi). The hymn credits the priest Vasishtha and the god Indra with the victory. For UPSC it matters as the earliest named political conflict in Indian sources and evidence of inter-tribal warfare in the Later Vedic transition period.

Example: Rigveda 7.18 names the defeated tribes, including the Purus, Yadus and Turvasas, preserving one of the oldest lists of ancient Indian peoples.

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Battle of Ten Kings (Dasarajna)

Dasarajna is the Rigvedic 'battle of ten kings' described in Rigveda 7.18, the same engagement as the Battle of Ten Kings: Sudas of the Bharatas defeated a ten-tribe confederacy on the Parushni (Ravi) with the aid of his priest Vasishtha. The name Dasarajna (dasa meaning ten, rajna meaning kings) is the term the hymn tradition uses for the conflict. For UPSC it matters as the locus classicus for early Vedic polity, priestly patronage and inter-tribal warfare in ancient India.

Example: The hymn's reference to Sudas crossing the Parushni places the battle on the Ravi in Punjab, anchoring Vedic geography for exam questions.

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Battle of Venni

The Battle of Venni was fought around the 2nd century CE at Venni (modern Kovilvenni near Thanjavur), where the early Chola ruler Karikala defeated a confederacy of the Pandya and Chera kings plus eleven minor velir chieftains. The Chera king Perum Cheralathan, wounded on his back, ended his life by starvation rather than bear the disgrace. For UPSC it matters as the watershed battle of the Sangam age that secured Chola hegemony in the Tamil country.

Example: Sangam poems like the Porunararruppatai celebrate Venni as the turning point of Karikala's career and the foundation of his long reign.

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Batukeshwar Dutt

Batukeshwar Dutt (1910 to 1965) was the revolutionary who, with Bhagat Singh, threw low-intensity bombs in the Central Legislative Assembly in Delhi on April 8, 1929, to protest repressive bills. Both men deliberately courted arrest so their trial would become a public platform for the freedom struggle. Dutt was transported to the Cellular Jail in the Andamans. For UPSC he matters as a key figure of the revolutionary nationalist phase alongside Bhagat Singh.

Example: The Assembly bomb trial turned the courtroom into a national platform, with the revolutionaries' defiant statements widely reported in the press.

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Baudhayan's Sulva Sutras

Baudhayana's Sulba Sutras are Sanskrit manuals of sacred geometry composed around 800 to 600 BCE, among the oldest of the Sulba Sutras attached to the Shrauta tradition. They lay down precise geometric rules for constructing Vedic fire altars, including a statement equivalent to the Pythagoras theorem and an approximation of the square root of 2 accurate to five decimal places. For UPSC they matter as evidence of advanced mathematical knowledge in ancient India, predating Greek geometry.

Example: The Baudhayana theorem states that the diagonal of a rectangle produces the same area as the two sides produce together, the same relation later credited to Pythagoras.

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Baul

Baul is the mystic minstrel tradition of Bengal and adjoining regions, blending Vaishnava bhakti with Sufi ideas in songs about divine love, the body and the inner self. Bauls are wandering singers who accompany themselves on the ektara, a single-stringed instrument. In 2005 UNESCO listed Baul songs on its Intangible Cultural Heritage list. For UPSC they matter as a signature syncretic folk tradition of eastern India for art and culture questions.

Example: The 19th-century mystic Lalon Fakir (Lalon Shah) composed hundreds of Baul songs that still shape Bengali spiritual life.

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Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation

The Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation is a seven-member regional grouping (Bangladesh, Bhutan, India, Myanmar, Nepal, Sri Lanka, Thailand) founded by the 1997 Bangkok Declaration and headquartered in Dhaka. It bridges South and Southeast Asia across sectors like connectivity, energy, and security. For UPSC, it is India's preferred Bay of Bengal platform, often contrasted with a stalled SAARC.

Example: the BIMSTEC Charter adopted at the 5th Summit in Colombo (March 2022), which gave the grouping a formal institutional framework

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BBIN

BBIN is the sub-regional grouping of Bangladesh, Bhutan, India and Nepal for cooperation on connectivity, trade, energy and water resources. It emerged as an alternative platform after SAARC stalled, with its flagship project the BBIN Motor Vehicles Agreement to allow seamless road transport of cargo and passengers across borders. For UPSC, BBIN is a key case study in sub-regionalism and India's neighbourhood connectivity strategy.

Example: The BBIN Motor Vehicles Agreement was signed in Thimphu in 2015, though Bhutan has yet to ratify it over environmental and traffic concerns.

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BBNJ Agreement is

The BBNJ Agreement is the 2023 Agreement on Biodiversity Beyond National Jurisdiction, adopted under UNCLOS and popularly called the High Seas Treaty. It creates a legal framework for marine genetic resources, area-based management tools including marine protected areas on the high seas, environmental impact assessments and capacity building for developing states, entering into force after sixty ratifications. For UPSC, it is a current GS-2 and GS-3 topic on ocean governance and multilateral environmental law.

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BCAS

BCAS is the Bureau of Civil Aviation Security, India's national regulator for civil aviation security under the Ministry of Civil Aviation. It began as a cell in the DGCA in January 1978 after the 1976 hijacking of an Indian Airlines flight, and became an independent department on 1 April 1987 following the 1985 Kanishka bombing. It lays down aviation security standards aligned with ICAO's Annex 17. For UPSC, it links internal security with transport governance.

Example: Its aviation security circulars include the "one hand bag" cabin-baggage rule enforced by the CISF at Indian airports.

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BCCI pay parity, 2022

BCCI pay parity (2022) is the Board of Control for Cricket in India's decision to pay women cricketers the same match fee as men for international matches. It was a landmark for gender equity in Indian sport, though domestic and league pay gaps persist. It is the essay's headline example of institutional course-correction.

Example: The BCCI's 2022 decision on equal match fees for women cricketers.

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beaches

Beaches are coastal landforms built by the deposition of sand, shingle, or shells along a shoreline by waves and longshore currents. They indicate constructive wave action and are among the most dynamic landforms, constantly reshaped by tides and storms. For UPSC geography, beaches appear in coastal erosion-deposition cycles, and India's long coastline hosts important tourist beaches relevant to questions on coastal geomorphology.

Example: Marina Beach, Chennai, the longest urban beach in India

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BECA

BECA, the Basic Exchange and Cooperation Agreement for Geo-Spatial Cooperation, is the India-United States pact signed in October 2020 for sharing geospatial intelligence, maps and satellite data for military use. It is the fourth of the India-US foundational defence agreements, after GSOMIA (2002), LEMOA (2016) and COMCASA (2018). For UPSC, BECA completes the interoperability framework that deepened the India-US defence partnership in the Indo-Pacific.

Example: BECA was signed during the third India-US 2+2 ministerial dialogue in New Delhi, giving India access to US geospatial data for targeting and navigation.

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bedaquiline

Bedaquiline is a diarylquinoline anti-tuberculosis drug with a novel mechanism: it blocks the mycobacterial ATP synthase enzyme, starving Mycobacterium tuberculosis of the energy it needs to survive. Developed by Janssen, it received US FDA approval in 2012 as the first new drug class for multidrug-resistant TB in over four decades, and WHO now prioritises it in shorter all-oral MDR-TB regimens. India incorporated bedaquiline into its revised national TB treatment guidelines, making it central to the country's TB elimination strategy.

Example: India's National TB Elimination Programme uses bedaquiline-based all-oral regimens for patients with drug-resistant TB.

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Bedsa

Bedsa is the site of early Buddhist rock-cut caves near Lonavala in Maharashtra, excavated in the 1st century BCE during the Satavahana period. The caves are Hinayana in character, with a notable chaitya hall whose ribbed, wooden-style vault and stupa exemplify early rock-cut architecture. For UPSC Bedsa matters as a standard example in ancient Indian art, showing the transition from timber to stone construction.

Example: The Bedsa chaitya hall's horseshoe-shaped window and carved stupas make it a textbook illustration of 1st-century BCE Buddhist cave architecture.

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Beejamrit

Beejamrit is the seed-treatment formulation of Zero Budget Natural Farming, made from cow dung, cow urine, lime and soil. Seeds are coated with it before sowing to protect against seed-borne diseases without chemical fungicides. For UPSC it is one of the four core ZBNF inputs, illustrating the natural-farming principle of replacing purchased chemicals with on-farm biological preparations.

Example: A farmer in Andhra Pradesh treats groundnut seed with Beejamrit instead of buying chemical seed dressers, cutting input costs to near zero.

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Beer Hall Putsch of 1923

The Beer Hall Putsch was Adolf Hitler's failed coup attempt of November 8 to 9, 1923, when Nazis tried to seize power in Munich by marching on government buildings. Police dispersed the marchers, killing sixteen Nazis, and Hitler was arrested and jailed at Landsberg, where he dictated Mein Kampf. For UPSC it matters as the episode that taught Hitler to seek power through legal means, leading to the Nazi strategy of electoral politics.

Example: The trial gave the then-obscure Hitler nationwide press coverage, turning a failed putsch into a propaganda success.

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before

Before is an ordinary English word denoting an earlier point in time or a prior position, and in UPSC history contexts it frames sequence, such as events before the advent of the British or before the Mauryan empire. As a glossary term it carries no technical definition; its UPSC value lies in reading comprehension, especially chronological reasoning in prelims statements and timeline-based mains answers.

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Begum Hazrat Mahal of Awadh

Begum Hazrat Mahal was the wife of the deposed Nawab Wajid Ali Shah who led the 1857 revolt in Lucknow after Awadh's annexation in 1856. She placed her minor son Birjis Qadr on the throne and organized the siege of the British Residency. After the revolt's defeat she fled to Nepal, where she died in Kathmandu in 1879. For UPSC she matters as one of the foremost women leaders of 1857 alongside Rani Lakshmibai.

Example: Her 1857 proclamation denounced British annexations and called on Hindus and Muslims to rise together against foreign rule.

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Begum Rokeya Sakhawat Hossain

Begum Rokeya Sakhawat Hossain (1880 to 1932) was a Bengali writer and social reformer who championed Muslim women's education. Her 1905 novella Sultana's Dream imagined a feminist utopia where women run the world, and in 1911 she founded the Sakhawat Memorial Girls' School in Kolkata. For UPSC she matters as a pioneering Indian feminist and educationist, often featured in modern history and women's empowerment questions.

Example: Sultana's Dream (1905) is regarded as one of the earliest feminist science-fiction works in world literature.

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behavioural nudge

Behavioural nudge is a policy tool from behavioural economics that steers citizens toward better choices without mandates, bans, or heavy incentives, by redesigning defaults and choices. Nudge theory won Richard Thaler the Nobel Prize, and India's Economic Survey 2018-19 applied it to flagship schemes. For UPSC GS-2 and GS-4, nudges link governance, ethics, and public policy questions.

Example: Economic Survey 2018-19 chapter on 'Nudging towards a New India', and Swachh Bharat behavioural campaigns

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bejagiri

Bejagiri is the Mughal jagirdari crisis in which mansabdars held high ranks but no jagirs to live on, because the number of claimants outgrew the paibaqi (reserved crown) land available for assignment. Short tenures and frequent transfers made jagirdars squeeze peasants for maximum short-term revenue. For UPSC, bejagiri explains a key structural cause of the Mughal empire's decline in the late 17th century.

Example: The jagirdari crisis deepening under Aurangzeb's reign (1658-1707)

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Belem Action Mechanism

The Belem Action Mechanism is the first just-transition mechanism under the UN Framework Convention on Climate Change (UNFCCC), adopted at COP30 in Belem, Brazil, in 2025. It is designed to provide technical support and labour protection for workers and communities affected by the shift away from fossil fuels toward low-carbon economies. Its adoption marked the first time the UN climate process created a dedicated institutional mechanism for managing the social and employment dimensions of decarbonisation.

Example: At COP30 in November 2025, parties established the Belem Action Mechanism to support workers and communities through the just transition away from fossil fuels.

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Belem Health Action Plan

The Belem Health Action Plan, launched at COP30 in Belem, Brazil, is a global initiative to strengthen health systems against the impacts of climate change. Backed by about 80 countries and international partners, it aims to build climate-resilient health infrastructure, improve disease surveillance for climate-sensitive illnesses, and address the health consequences of heat, extreme weather and shifting disease patterns. A coalition of 35 philanthropies committed an initial 300 million US dollars to support its implementation.

Example: The Belem Health Action Plan elevated health into a formal UNFCCC workstream with 300 million dollars in philanthropic funding announced at COP30.

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Belgrade Summit

The Belgrade Summit was the first summit of the Non-Aligned Movement, held in September 1961 in Belgrade, Yugoslavia. Hosted by Josip Broz Tito with Gamal Abdel Nasser and Jawaharlal Nehru, it brought together 25 states seeking a course independent of the US and Soviet blocs. For UPSC it matters as the founding moment of NAM and the institutional expression of India's Cold War foreign policy.

Example: The summit adopted membership criteria such as an independent foreign policy and opposition to colonialism, defining non-alignment for decades.

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Bellandur

Bellandur is a large lake in south-eastern Bengaluru, Karnataka, that became nationally infamous in the mid-2010s when it repeatedly produced thick toxic foam and even caught fire. The foam and fires were caused by untreated sewage and industrial effluents discharged into the lake, making it a textbook example of the ecological collapse of urban water bodies. Its degradation is frequently cited in UPSC answers on urban water pollution and the failure of sewage treatment enforcement.

Example: In 2015 and 2017, Bellandur Lake's frothing surface spilled onto nearby roads and the lake surface caught fire, forcing authorities to act on sewage treatment compliance in Bengaluru.

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Belmont Report

The Belmont Report is the 1979 report of the US National Commission for the Protection of Human Subjects, which laid down three ethical principles for research involving humans: respect for persons, beneficence and justice. Issued after scandals like the Tuskegee study, it requires informed consent, risk-benefit assessment and fair subject selection. For UPSC it matters as the foundational text of research ethics and bioethics, directly relevant to GS-4 ethics answers.

Example: India's ICMR ethics guidelines and institutional ethics committees draw on the same three principles when reviewing medical research.

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Belt and Road Initiative

The Belt and Road Initiative is China's transcontinental infrastructure programme launched by Xi Jinping in 2013, combining the Silk Road Economic Belt across Eurasia with a 21st Century Maritime Silk Road through the Indian Ocean. It finances ports, railways, and energy projects in partner countries, drawing criticism over debt sustainability and strategic leverage. For UPSC IR, it is the framework behind China's Indian Ocean presence and India's refusal to join.

Example: the China-Pakistan Economic Corridor, the BRI's flagship corridor linking Gwadar port to Kashgar

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Belur

Belur is the temple town in Karnataka that was the first capital of the Hoysala dynasty, famous for the Chennakeshava Temple built by Vishnuvardhana in 1117 CE. Its star-shaped plan, soapstone carving and crowded sculptural friezes define mature Hoysala architecture. For UPSC Belur matters as a staple of medieval art questions, usually paired with Halebidu and Somnathapura among the Hoysala temples on the UNESCO World Heritage list.

Example: The Chennakeshava Temple's bracket figures (madanikas) are among the most photographed sculptures of Hoysala art.

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Benami Transactions (Prohibition) Amendment Act, 2016

This Act overhauled the largely inoperative Benami Transactions (Prohibition) Act, 1988. It defines benami transactions, in which property is held by one person though paid for by another, prohibits them, and empowers authorities to provisionally attach and ultimately confiscate benami property, with imprisonment of up to seven years for offenders. It came into force in November 2016 as part of the black-money legislative framework. It is a staple of UPSC questions on economic offences.

Example: Flats bought benami in a relative's name to evade tax can now be confiscated without compensation.

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benami transfers

Benami transfers are property transactions in which the real beneficiary is not the person in whose name the property is held, commonly used to park black money and evade taxes. The Benami Transactions (Prohibition) Act, 1988, strengthened by the 2016 amendment, makes such property liable to confiscation. For UPSC GS-3, benami law is examined alongside money laundering, black money, and the Prevention of Money Laundering Act.

Example: The Benami Transactions (Prohibition) Amendment Act, 2016

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beneficence

Beneficence is the ethical principle of actively doing good for others, going beyond merely avoiding harm. In UPSC GS-4 ethics, it covers charity, kindness, and welfare-oriented action by public servants, distinct from benevolence as a feeling. For mains answers, beneficence anchors compassion and service-delivery arguments, but answers must balance it against impartiality and rule-based decision making.

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Bengal and Bihar

Bengal and Bihar is the pairing of the two eastern provinces that formed the core of British India, from the grant of the diwani in 1765 through the Bengal Presidency era. Both were reshaped by the 1905 partition of Bengal and the 1912 creation of Bihar and Orissa as a separate province. For UPSC the phrase usually signals questions on colonial administration, the Permanent Settlement and the freedom movement's eastern base.

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Bengal and Sind

Bengal and Sind are two distinct regions that appear paired in colonial and partition-era contexts: Bengal in the east, Sind in the west (now in Pakistan). Under the Government of India Act 1935, Sind was separated from the Bombay Presidency while Bengal remained a governor's province, and both elected Muslim League governments in 1946. For UPSC the pairing usually arises in questions on provincial autonomy and the 1947 partition.

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Bengal army

The Bengal Army was the largest of the East India Company's three Presidency armies, recruited mainly from high-caste peasants of Awadh, Bihar and eastern UP. Its sepoys formed the core of the 1857 revolt, beginning with Mangal Pandey at Barrackpore. After 1857 the British deliberately cut its dominance and shifted recruitment westward. For UPSC it matters as the institutional cradle of the 1857 uprising and of post-revolt military reorganization.

Example: The greased-cartridge controversy of 1857 spread fastest through Bengal Army regiments, whose sepoys mutinied at Meerut on May 10, 1857.

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Bengal Chemicals

Bengal Chemicals is the shortened name of Bengal Chemicals and Pharmaceuticals, founded in 1901 by the scientist Prafulla Chandra Ray as the Bengal Chemical and Pharmaceutical Works. Born of the Swadeshi spirit, it was one of India's first indigenous modern industrial enterprises, making chemicals and medicines. For UPSC it matters as the classic example of nationalist entrepreneurship and Swadeshi industry in the freedom movement.

Example: Founded during the Swadeshi era, it became a model of Indian-owned industry at a time when most large industry was British-controlled.

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Bengal Famine

Bengal Famine is the generic term for the catastrophic famines that struck Bengal, chiefly the Great Bengal Famine of 1770 under early Company rule, which may have killed a third of Bengal's population, and the famine of 1943. Both combined crop failure with administrative breakdown, hoarding and war-related disruption. For UPSC they matter as evidence of colonialism's human cost and recur in questions on British economic policy and Amartya Sen's entitlement theory.

Example: Warren Hastings estimated that the 1770 famine carried off about a third of Bengal's inhabitants, a figure still cited in economic-history debates.

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Bengal famine of 1943

The Bengal famine of 1943 was the last great famine in India, killing an estimated 2 to 3 million people in wartime Bengal. The fall of Burma cut rice imports while war inflation, hoarding, the British denial policy and continued food exports created artificial scarcity amid adequate availability. For UPSC it matters because Amartya Sen used it in Poverty and Famines (1981) to prove famines stem from entitlement failure, not absolute food shortage.

Example: Sen showed that Bengal produced enough food in 1943 but war-driven price spikes stripped labourers of the purchasing power to buy it.

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Bengal Gazette

The Bengal Gazette, or Hicky's Bengal Gazette, was India's first newspaper, started by James Augustus Hicky in Calcutta in 1780. It openly criticized Governor-General Warren Hastings and the Company's officials, pioneering adversarial journalism. The paper was shut down in 1782 after Hicky's imprisonment for libel. For UPSC it matters as the conventional starting point of the Indian press and of press-freedom debates.

Example: Hicky printed attacks on Hastings and Chief Justice Elijah Impey, making press censorship a live political issue from the very birth of Indian journalism.

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Bengal National College

Bengal National College is the nationalist educational institution founded in Calcutta in 1906 during the Swadeshi movement as an Indian alternative to colonial universities. Set up by the National Council of Education, it appointed Aurobindo Ghosh as its first principal and taught science, technology and national culture. For UPSC, it is a leading example of the national education plank of the Swadeshi programme.

Example: The college later grew into Jadavpur University, and its teachers included figures such as Rabindranath Tagore and Surendra Nath Banerjee.

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Bengal school

The Bengal School of Art was the early-20th-century movement led by Abanindranath Tagore at the Calcutta School of Art, which rejected Western academic styles in favour of Indian idioms drawn from Mughal, Rajput and Japanese wash painting. It made art a vehicle of Swadeshi cultural nationalism. For UPSC it matters as the defining school of modern Indian art for art-and-culture questions.

Example: Abanindranath's Bharat Mata (1905), depicting India as a saffron-clad goddess, became an icon of the Swadeshi movement.

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Bengal Tenancy Act of 1885

The Bengal Tenancy Act of 1885 was the colonial law that defined the rights of tenants and landlords in Bengal, Bihar and Orissa after decades of agrarian unrest. Tenants who had held land continuously for twelve years gained occupancy rights: protection from arbitrary eviction and limits on rent enhancement. For UPSC it matters as the landmark tenant-protection law that followed the Indigo Revolt and the Pabna uprisings, shaping agrarian relations.

Example: The Act gave occupancy ryots a heritable interest in their holdings, a status zamindars could not easily overturn.

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Bengal, Bihar and Orissa

Bengal, Bihar and Orissa are the three eastern provinces whose diwani (revenue rights) the Mughal emperor Shah Alam II granted to the East India Company in 1765 after the Battle of Buxar. The grant turned a trading company into a territorial power with a regular revenue stream. For UPSC the trio matters as the foundation of British rule in India, linked to the Permanent Settlement and early colonial administration.

Example: The Company's new revenue financed its armies, letting it expand from Bengal across India within decades.

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Bengalee

The Bengalee is the English-language nationalist newspaper founded in Calcutta in 1862 by Girish Chandra Ghosh and bought in 1879 by Surendranath Banerjee, who edited it for four decades. It became the leading voice of moderate nationalism, campaigning against racial discrimination and the 1905 partition of Bengal, and Banerjee's 1883 imprisonment for contempt made him the first Indian journalist jailed. For UPSC, it is a core GS-1 fact on the nationalist press.

Example: Banerjee's 1883 contempt case, the first jailing of an Indian journalist

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Bengali

Bengali is the Indo-Aryan language spoken in West Bengal, Tripura and Bangladesh, India's second most spoken language, written in a script derived from Brahmi. Its defense in East Pakistan, where protesters were killed on February 21, 1952, sparked Bengali nationalism and is commemorated as International Mother Language Day. For UPSC it matters in language politics, the Eighth Schedule and the Bangladesh liberation movement.

Example: The 1952 Language Movement martyrs of Dhaka are honoured every February 21, now observed worldwide as International Mother Language Day.

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Bengaluru

Bengaluru is the capital of Karnataka, founded as a fort town by Kempe Gowda in 1537 and developed under the Wodeyars, Hyder Ali and Tipu Sultan. It became India's information-technology capital in the 1990s, earning the tag 'Silicon Valley of India', alongside its older identity as the Garden City. For UPSC it matters in questions on urbanization, the IT services economy and startup ecosystems.

Example: The Electronics City industrial park, established in the late 1970s, seeded the software cluster that made Bengaluru a global IT hub.

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Bengaluru-Mumbai (BMEC)

BMEC stands for the Bengaluru-Mumbai Economic Corridor, a proposed industrial corridor linking Mumbai and Bengaluru across Maharashtra and Karnataka over roughly 1,000 km. Planned around NH-48, the Mumbai-Bengaluru railway line and the Dabhol-Bengaluru gas pipeline, it envisages industrial nodes, new cities and logistics parks to boost manufacturing and create jobs. For UPSC it is a key example in questions on industrial corridors, regional development and infrastructure policy.

Example: India and the UK agreed at their November 2013 summit to undertake a joint feasibility study of the corridor, with the DMICDC and UK Trade and Investment as the nodal agencies.

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Benito Mussolini

Benito Mussolini was the Italian fascist dictator who founded the National Fascist Party and seized power in Italy through the March on Rome in 1922. He built a one-party state around the cult of Il Duce, militarised Italy, invaded Ethiopia in 1935, and allied Italy with Nazi Germany in the Second World War before being overthrown in 1943. For UPSC, he is the canonical case study of fascism, corporatism and the inter-war crisis of democracy.

Example: Mussolini's 1935 invasion of Ethiopia exposed the League of Nations' failure to stop aggression, a turning point frequently cited in world history answers.

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Benjamin Franklin's Albany Plan of Union

The Albany Plan of Union was a proposal drafted by Benjamin Franklin at the Albany Congress of 1754 during the French and Indian War. It called for the thirteen British colonies to unite under a Grand Council with power to raise armies, levy taxes and manage native relations, under a Crown-appointed president. Though rejected by the colonies and London, it was the first serious colonial unity plan and foreshadowed the Articles of Confederation. UPSC may test it in world history.

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Bentham

Jeremy Bentham (1748-1832) was the English philosopher who founded utilitarianism: the doctrine that the right action or law is the one producing the greatest happiness of the greatest number, measured by his felicific calculus of pleasures and pains. He championed codified law, prison reform, and democratic accountability. In GS-4 ethics, utilitarianism is the standard consequentialist lens, contrasted with Kant's duty-based deontology.

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Bentinck

Lord William Bentinck was the Governor-General of India from 1828 to 1835, remembered as a reforming administrator. His tenure saw the abolition of sati through Regulation XVII of 1829, the suppression of thuggee, the replacement of Persian with English in higher courts, and financial retrenchment. His 1835 resolution made English the medium of higher education. For UPSC, Bentinck anchors the theme of 19th-century social reforms and the anglicist-orientalist debate.

Example: The abolition of sati in 1829, undertaken with support from Raja Ram Mohan Roy, is the most-quoted reform of his administration in history answers.

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Bentinck's resolution of 1835

Bentinck's resolution of 1835 was the order of 7 March 1835 by which Governor-General William Bentinck accepted Macaulay's Minute on Indian Education and declared that funds for education would henceforth be spent on English education alone. It ended the anglicist-orientalist controversy in favour of the anglicists and led to English becoming the medium of higher education and administration. For UPSC, it is central to colonial education policy and Macaulay's 'downward filtration' doctrine.

Example: The resolution directly implemented Thomas Babington Macaulay's Minute of 2 February 1835, which famously argued for creating a class 'Indian in blood and colour, but English in taste'.

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Berar — Imad Shahis

The Imad Shahis were the ruling dynasty of the Berar sultanate, one of the five Deccan sultanates that emerged from the Bahmani kingdom. Founded around 1490 by Fathullah Imad-ul-Mulk, a convert who had been a Bahmani governor, they ruled from Gawilgad and Elichpur until Berar was annexed by Ahmadnagar in 1574. For UPSC, the dynasty completes the Bahmani successor-state set alongside the Adil Shahis, Nizam Shahis, Qutb Shahis and Barid Shahis.

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Bergeron system

The Bergeron system, more precisely the Bergeron-Findeisen process or ice-crystal theory of precipitation, explains how rain forms in cold clouds. Proposed by Tor Bergeron, it holds that in mixed clouds of supercooled droplets and ice crystals, vapour deposits onto the ice crystals at the expense of the droplets, since saturation vapour pressure is lower over ice. The crystals grow heavy and fall as snow or melt into rain. For UPSC physical geography, it is the standard explanation of precipitation formation.

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Berlin Blockade and Airlift (1948–49)

The Berlin Blockade was the Soviet Union's 1948-1949 closure of all rail, road and canal access to West Berlin after the Western powers introduced the Deutsche Mark in their occupation zones. Rather than withdraw, the Western Allies supplied the city entirely by air for nearly a year, flying in food and coal around the clock. The Soviets lifted the blockade in May 1949. For UPSC world history, it marks the first major crisis of the Cold War.

Example: The airlift, codenamed Operation Vittles, delivered over 2 million tonnes of supplies to West Berlin and cemented the Western commitment to the city.

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Berlin Conference (1884-85)

The Berlin Conference was the 1884-1885 meeting of fourteen European powers convened by Otto von Bismarck to regulate the Scramble for Africa. Its General Act laid down the principle of 'effective occupation', requiring a colonial claim to be backed by actual administration, and declared free navigation on the Congo and Niger rivers. It accelerated the partition of Africa with no African representation. For UPSC, it is the landmark event for studying imperialism, colonialism and the artificial borders of modern Africa.

Example: The conference sanctioned King Leopold II of Belgium's personal control over the Congo, one of the most notorious cases of colonial exploitation.

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Berlin Conference 1884-85

The Berlin Conference of 1884-85 is the meeting of European powers, convened by Bismarck, that set the rules for partitioning Africa, including effective occupation of claimed territory. No African was represented; the arbitrary borders drawn there still shape African politics.

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Berlin Wall

The Berlin Wall was the fortified barrier erected by East Germany in August 1961 to seal off West Berlin and stop mass emigration to the West. Built overnight and later expanded into a system of concrete walls, fences, watchtowers and minefields, it became the most visible symbol of the Cold War's division of Europe. Its fall in November 1989 signalled the end of communist rule in Eastern Europe. For UPSC, it is essential to Cold War history.

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Berlin Wall (1961-1989)

The Berlin Wall, built in August 1961, is the fortified barrier with which East Germany sealed West Berlin to stop emigration to the West. It became the physical symbol of the Cold War division of Europe until crowds breached it on 9 November 1989.

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Berlin Wall fell in November 1989

The fall of the Berlin Wall on 9 November 1989 was the moment East German border guards, following a confused announcement of new travel regulations, opened the crossings and crowds streamed into West Berlin. The event ended 28 years of the city's division and became the defining symbol of the collapse of communism in Eastern Europe, leading to German reunification in 1990. For UPSC, it anchors questions on the end of the Cold War and the post-bipolar world order.

Example: US President George H.W. Bush and Soviet leader Mikhail Gorbachev's Malta Summit of December 1989 is often cited as the diplomatic close of the Cold War that the Wall's fall made possible.

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Bernier–Mughals

Bernier refers to Francois Bernier, the French physician and traveller who served in the Mughal court between about 1658 and 1668 during Aurangzeb's reign. His 'Travels in the Mogul Empire' described Mughal administration, the mansabdari system and urban life, and famously argued that crown ownership of all land stifled private initiative and wealth. For UPSC, Bernier's account is a major foreign source on the Mughals and fuels the debate on the causes of Mughal decline.

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Berubari Union

Berubari Union was a West Bengal territory whose proposed transfer to Pakistan under the 1958 Nehru-Noon Agreement prompted the Supreme Court's advisory opinion in Re: Berubari Union (1960). The Court held that ceding Indian territory to a foreign country requires a constitutional amendment under Article 368, not a mere executive agreement or ordinary legislation. Parliament then passed the Ninth Amendment (1960) to effect the transfer. It remains the leading UPSC case on cession of territory.

Example: The ruling was later distinguished in boundary-settlement cases like Ram Kishore v. Union of India.

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Besant's arrest and release

Besant's arrest refers to the internment of Annie Besant in June 1917 by the Madras government under the Defence of India Act for her Home Rule agitation. The Home Rule League she founded in 1916 had mobilised middle-class Indians with newspapers like New India and demands for self-government within the Empire. Her arrest sparked nationwide protests, and her release in September 1917 was the movement's high point. For UPSC, the episode shows how repression backfired and fed the nationalist surge.

Example: Annie Besant became president of the Indian National Congress at its Calcutta session in 1917, the first woman to hold the office, soon after her release.

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Bessemer steel process

The Bessemer steel process was the first inexpensive industrial method for mass-producing steel, patented by Henry Bessemer in 1856. It worked by blowing air through molten pig iron in a pear-shaped converter, burning off excess carbon and impurities in minutes rather than hours. The process made steel cheap enough for railways, bridges and ships, and became the foundation of the second industrial revolution. For UPSC, it is the classic example linking a technological breakthrough to industrial and economic transformation.

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Beti Bachao Beti Padhao

Beti Bachao Beti Padhao is the Government of India's scheme launched at Panipat, Haryana, on 22 January 2015 to arrest the declining child sex ratio (919 girls per 1,000 boys in Census 2011) and promote girls' survival, protection, education, and participation. Run jointly by the Women and Child Development, Health, and Education ministries, it is the flagship answer-point for GS-1 society questions on gender and demographic imbalance.

Example: its launch district Panipat, Haryana, chosen because the state had among the worst child sex ratios in the country

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Beti Bachao Beti Padhao (BBBP)

Beti Bachao Beti Padhao (BBBP), launched in 2015 from Panipat, is the government's flagship scheme to arrest declining child sex ratio through enforcement against sex-selective abortion and campaigns for girls' education. It pairs the PCPNDT Act with Sukanya Samriddhi Yojana and Mission Shakti. It is the essay's lead policy on the girl child.

Example: The 2015 Beti Bachao Beti Padhao scheme for the survival and education of the girl child.

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beyond Bengal

Beyond Bengal describes how the Swadeshi Movement of 1905-08, though triggered by the partition of Bengal, spread to other parts of India, turning a regional protest into a national agitation. Leaders like Tilak in Poona and Bombay, Lajpat Rai in Punjab, and Chidambaram Pillai in Madras carried the boycott and swadeshi message outward. For UPSC, it shows how the movement seeded the extremist phase of the national movement.

Example: Bal Gangadhar Tilak's Swadeshi campaign in Poona and Bombay, 1905-06

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Bhabha Atomic Research Centre (BARC)

The Bhabha Atomic Research Centre is the primary research and development institution of India's Department of Atomic Energy, located at Trombay in Mumbai. Founded by Homi J. Bhabha and renamed after him in 1967, it is responsible for designing India's indigenous nuclear reactors and for research spanning reactor physics, nuclear fuel cycles, radiation applications in medicine and agriculture, and high-energy physics. Together with the Nuclear Power Corporation of India, it is developing India's small modular reactor designs.

Example: BARC and NPCIL are jointly developing the Bharat Small Modular Reactor (BSMR-200), a 200 MWe indigenous reactor design.

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Bhabha scattering

Bhabha scattering is the process of electron-positron scattering (an electron and a positron colliding and deflecting off each other), whose quantum-electrodynamic description was worked out by Homi J. Bhabha in the 1930s. Because its cross-section can be calculated very precisely, it serves as a standard calibration process, or luminosity monitor, in electron-positron particle colliders. It is one of the classic tests of quantum electrodynamics and a landmark contribution of Indian physics.

Example: At the LEP collider at CERN, Bhabha scattering events were used to measure the collider's luminosity with high precision.

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Bhadrabahu

Bhadrabahu is the Jain monk and spiritual teacher of Chandragupta Maurya, traditionally regarded as the last shruta-kevalin, one who knew the complete Jain canon. Tradition holds that during a twelve-year famine he led a Jain migration south to Shravanabelagola in Karnataka, where Chandragupta followed him as a monk. For UPSC, Bhadrabahu links the Mauryan emperor to Jainism and the Digambara tradition of the south.

Example: The Kalpasutra, the Jain text on the lives of the Tirthankaras, is traditionally attributed to Bhadrabahu.

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Bhaga

Bhaga in Vedic literature means 'share' or 'portion', and it appears both as a deity and as a fiscal term. As one of the Adityas, Bhaga is the god of fortune, wealth and marriage. In later Vedic political economy the word denotes the king's customary share of agricultural produce, a voluntary offering in early times that hardened into a regular tax. For UPSC ancient history, bhaga illustrates how tribute evolved into taxation and state revenue in the later Vedic polity.

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bhaga, hiranya, bali

Bhaga, hiranya, and bali are three principal taxes of the Mauryan revenue system. Bhaga was the king's share of agricultural produce, typically one-sixth; hiranya was a tax paid in gold; and bali was originally a voluntary offering that became a compulsory levy. For UPSC prelims, they are standard Arthashastra-based facts on Mauryan administration and land revenue.

Example: Kautilya's Arthashastra, which lists these revenue heads for the Mauryan state

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Bhagadugha

Bhagadugha was a later Vedic official responsible for collecting the king's share, the bhaga, of agricultural produce. Listed among the ratnins, the king's 'jewels' or high functionaries, he was essentially the revenue collector of the nascent Vedic state, marking the shift from voluntary tribute to organised taxation. For UPSC, bhagadugha is a frequently asked Prelims term for testing knowledge of Vedic administration and its functionaries like the sangrihitri, akshavapa and gramani.

Example: The UPPCS Prelims 2023 asked directly which officer was known as bhagadugha, with the correct answer being the revenue collector.

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Bhagat Singh and Batukeshwar Dutt

Bhagat Singh and Batukeshwar Dutt were revolutionaries of the Hindustan Socialist Republican Association who threw two low-intensity bombs in the Central Legislative Assembly in Delhi on 8 April 1929. They deliberately courted arrest to use the trial as a platform, shouting slogans like 'Inquilab Zindabad' and protesting the Public Safety Bill and Trade Disputes Bill. For UPSC modern history, the act exemplifies the revolutionaries' strategy of propaganda by deed combined with public courtroom advocacy.

Example: Their trial gave Bhagat Singh a national platform, and his hunger strike in jail for political prisoner rights won wide public sympathy.

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Bhagat Singh, Chandrashekhar Azad, Surya Sen

Bhagat Singh, Chandrashekhar Azad and Surya Sen were the three iconic leaders of the revolutionary phase of the Indian national movement in the late 1920s. Bhagat Singh led the Hindustan Socialist Republican Association in the north, Azad commanded it as its chief, and Surya Sen masterminded the Chittagong Armoury Raid of 1930 in Bengal. For UPSC, the trio together represents the socialist, militant strand of nationalism that ran parallel to Gandhian mass movements.

Example: Surya Sen's Chittagong Armoury Raid of 18 April 1930, in which revolutionaries briefly held the town, is the eastern counterpart to the HSRA's northern actions.

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Bhagat Singh, Rajguru and Sukhdev are executed (23 March)

This refers to the execution of Bhagat Singh, Shivaram Rajguru and Sukhdev Thapar on 23 March 1931 in Lahore Central Jail for their role in the Lahore Conspiracy Case, including the killing of Saunders in 1928. They went to the gallows cheerfully, embracing martyrdom at a young age. Observed as Martyrs' Day, their execution electrified the youth and remains a touchstone of revolutionary sacrifice. For UPSC, it connects the revolutionary movement with the Gandhi-Irwin Pact debates of 1931.

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Bhagat Singh, Rajguru and Sukhdev hanged on 23 March 1931

Bhagat Singh, Rajguru and Sukhdev were hanged on 23 March 1931 in Lahore Central Jail after being convicted in the Lahore Conspiracy Case arising from the murder of police officer J.P. Saunders in 1928, itself retaliation for the lathi-charge death of Lala Lajpat Rai. Their defiant conduct during the trial and on the scaffold made them national icons of sacrifice. For UPSC, the hanging is inseparable from questions on the revolutionary movement, the Karachi Congress session and the Gandhi-Irwin Pact.

Example: The Karachi session of the Congress in March 1931 passed a resolution on fundamental rights even as it debated Gandhi's inability to save the three revolutionaries.

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Bhagat Singh, Sukhdev, Rajguru and Chandrashekhar Azad

Bhagat Singh, Sukhdev, Rajguru and Chandrashekhar Azad were the leading figures of the Hindustan Socialist Republican Association, the main revolutionary organisation of northern India in the late 1920s. Azad led the HSRA as its commander, while the other three carried out its daring actions, from the Kakori train robbery legacy to the Assembly bomb case and the Saunders murder. For UPSC, the quartet represents the ideologically socialist turn of the revolutionary movement after the Non-Cooperation withdrawal.

Example: Chandrashekhar Azad died in a police encounter at Alfred Park, Allahabad, in February 1931, refusing capture.

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Bhagavad Gita

The Bhagavad Gita is the 700-verse Sanskrit dialogue between Krishna and the warrior Arjuna, set on the Kurukshetra battlefield in the Bhishma Parva of the Mahabharata. Through the paths of karma, bhakti and jnana, Krishna resolves Arjuna's moral crisis about fighting his own kin. For UPSC, the Gita is essential to Indian philosophy, ethics (nishkama karma) and the Bhakti tradition.

Example: Mahatma Gandhi called the Gita his spiritual dictionary, and its teaching of selfless action shaped his philosophy of satyagraha.

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Bhagwant Das

Bhagwant Das was the Kachhwaha ruler of Amber who reigned from about 1573 to 1589 as a leading noble of the Mughal Empire. He continued the Rajput-Mughal alliance begun by his father Bharmal, serving as one of Akbar's trusted generals, and his daughter Man Bai was married to Prince Salim, the future Jahangir. For UPSC medieval history, he exemplifies Akbar's policy of integrating Rajput chiefs into the imperial nobility through marriage and military service.

Example: Bhagwant Das governed the key provinces of Kabul and Lahore for Akbar, showing the trust placed in Rajput mansabdars.

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Bhaja

Bhaja refers to the Bhaja Caves, a group of 22 rock-cut Buddhist caves near Lonavala in Maharashtra dating to the 2nd century BCE. Belonging to the early Hinayana phase, they include one of the finest chaityagrihas, a large apsidal prayer hall with a stupa and teakwood-imitating ribs, alongside vihara dwellings for monks. For UPSC art and culture, Bhaja is a textbook example of early Deccan rock-cut architecture and the transition from wood to stone construction.

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Bhakra Beas Management Board

The Bhakra Beas Management Board is a statutory body constituted under the Punjab Reorganisation Act, 1966 to administer the Bhakra-Nangal and Beas projects. It regulates the distribution of water and power from these projects among the partner states of Punjab, Haryana, Rajasthan, Himachal Pradesh, Delhi and Chandigarh. It surfaces frequently during inter-state water disputes and illustrates cooperative federalism in river-water management.

Example: The Board releases water from the Bhakra and Pong reservoirs according to each state's allocated share.

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Bhakra-Nangal

Bhakra-Nangal is India's landmark multipurpose river valley project on the Sutlej river, straddling Himachal Pradesh and Punjab. It comprises the Bhakra Dam, one of the world's highest gravity dams creating the Gobind Sagar reservoir, and the downstream Nangal dam with its hydel channels. Completed in the 1960s, it provides irrigation, hydropower and flood control to the Green Revolution heartland. For UPSC, it symbolises Nehruvian planned development and the 'temples of modern India' vision.

Example: Jawaharlal Nehru inaugurated the Bhakra Dam in 1963, calling dams the 'temples of modern India'.

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Bhakti

Bhakti is the Sanskrit term for devotion, denoting the loving, personal relationship between a devotee and a deity that became the dominant mode of Hindu religiosity from the early medieval period. It bypasses ritual priesthood and philosophical abstraction, emphasising surrender, singing of hymns and direct emotional union with god. For UPSC, bhakti is the doctrinal core behind the Bhakti movement, temple culture and the vernacular religious literature of medieval India.

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Bhakti movement

The Bhakti movement is the devotional movement that swept India from the Tamil Alvars and Nayanars of the 6th-9th centuries to the northern sants like Kabir, Nanak, Mirabai and Tulsidas. Emphasising personal devotion to god over ritual and priestly mediation, composed in vernacular languages, it challenged caste hierarchy in both its nirguna (formless) and saguna (with attributes) streams. For UPSC, it is a foundational GS-1 medieval culture topic linking religion, language and social reform.

Example: Kabir, the 15th-century nirguna sant of Varanasi

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Bhakti saints

Bhakti saints were the poet-devotees of the medieval Bhakti movement who spread devotional religion through vernacular songs and verses. They include the Tamil Alvars and Nayanars, Maharashtra's Tukaram and Namdev, Bengal's Chaitanya, and northern figures like Kabir, Ravidas, Tulsidas, Mirabai and Surdas. Often from humble or artisan backgrounds, they challenged caste barriers and priestly monopoly. For UPSC art and culture, their compositions are key sources for medieval language, music and social reform.

Example: Tulsidas's Ramcharitmanas, composed in Awadhi, carried the Ramayana to the common people of north India.

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Bhangra

Bhangra is the energetic folk dance of Punjab traditionally performed by farmers at harvest time, especially during Baisakhi, to celebrate a good crop. Characterised by vigorous shoulder and leg movements, it is accompanied by the dhol drum and songs called boliyan. In the modern era it has fused with pop music into a global dance and fitness phenomenon. For UPSC art and culture, Bhangra is the standard example of a Punjabi harvest folk tradition alongside Giddha.

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Bhanwari Devi

Bhanwari Devi is the Rajasthan social worker whose 1992 gangrape, a retaliation for her campaign against child marriage as a government saathin, led to the landmark Vishaka judgment. The public interest litigation filed in her support resulted in the Supreme Court's 1997 Vishaka guidelines against sexual harassment at the workplace, India's first legal framework on the issue. For UPSC, her case links grassroots activism, gender justice and judicial law-making before the 2013 POSH Act.

Example: The Supreme Court's Vishaka v. State of Rajasthan (1997) laid down workplace harassment guidelines that remained the law for sixteen years.

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Bhaona

Bhaona is the traditional Assamese devotional theatre form created by the saint-scholar Srimanta Sankaradeva in the 15th-16th centuries as part of the Ekasarana Dharma. Performed in village namghars and monastic sattras, it dramatises stories from the Ramayana, Mahabharata and the Bhagavata Purana through song, dialogue, dance and masks. For UPSC art and culture, bhaona is the classic example of a regional bhakti theatre tradition and Assam's living performing heritage.

Example: The mask-making tradition of the Samaguri Sattra in Majuli, used in bhaona performances, is a celebrated craft of Assam.

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Bharat (One Nation One Fertiliser brand)

Bharat is the single brand under which all subsidised fertilisers must be marketed across India, launched as the Pradhan Mantri Bharatiya Jan Urvarak Pariyojana in October 2022. Urea, DAP, MOP and NPK all carry the Bharat name to curb diversion, cut freight subsidy and guarantee one quality standard. For UPSC, it is a standard example of subsidy reform and logistics efficiency in agriculture.

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Bharat 6G Alliance (B6GA)

The Bharat 6G Alliance is a collaborative platform of public and private companies, academia, research institutions and standards bodies set up to make India a leader in 6G. Its aims include open R and D, market access for Indian telecom products, indigenous manufacturing, co-innovation and Indian 6G intellectual property.

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Bharat 6G Vision

Chakravyuh is the endpoint anti-malware and security suite bundled with Maya OS, creating a protective layer that traps lateral movement by advanced attackers. Named after the Mahabharata's impregnable battle formation, it is part of the Defence Ministry's indigenisation drive. It matters as the defensive shield of India's military computing.

Example: Chakravyuh blocking APT lateral movement on defence systems

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Bharat 6G Vision (2023)

Bharat 6G Vision (2023) is India's roadmap for the sixth-generation telecom standard, aiming at Indian patents, standards contributions and rural-appropriate use cases. It follows the rapid 5G rollout. It is the essay's policy anchor for connectivity ambition.

Example: India's 2023 vision document for 6G leadership.

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Bharat Atta

Bharat Atta is the subsidised wheat-flour brand sold by the government through cooperatives and OMSS to check retail atta prices. Milled from FCI wheat, it is retailed at a fixed below-market price during inflationary phases. For UPSC it is the flagship example of direct consumer price intervention.

Example: Its sale at a capped price in cities during a wheat-price surge shows the intervention in action.

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Bharat brand

Bharat brand is the government's subsidised retail brand under which FCI grain and pulses are sold directly to consumers through OMSS, NAFED and NCCF outlets. Bharat Atta, Bharat Dal and Bharat Rice are sold below market prices to cool food inflation. For UPSC it is the consumer-facing price-intervention brand.

Example: A family buying Bharat Atta at a price well below market rates experiences the brand's inflation-fighting role.

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Bharat Dal

Bharat Dal is the subsidised pulse brand, mainly chana, sold by the government through NAFED and NCCF retail channels. It brings protein-rich pulses to consumers at controlled prices when dal inflation bites. For UPSC it extends the Bharat-brand logic from cereals to pulses.

Example: Chana sold as Bharat Dal below market price during a dal-price spike illustrates the scheme.

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Bharat Ratna

The Bharat Ratna is India's highest civilian award, instituted in 1954 and conferred by the President of India for exceptional service or performance of the highest order in any field of human endeavour. Originally limited to fields such as art, literature, science and public service, its scope was broadened in 2013 to recognise achievements in any field. Recipients receive a medallion and a sanad (certificate), and the award carries no monetary grant.

Example: In 2014, the Bharat Ratna was conferred on scientist C. N. R. Rao and cricketer Sachin Tendulkar.

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Bharat Ratna in 2014

The Bharat Ratna conferred in 2014 was awarded to two Indians: the chemist C. N. R. Rao and the cricketer Sachin Tendulkar. C. N. R. Rao, one of India's most eminent scientists, was recognised for his pioneering work on transition-metal oxides, high-temperature superconductors and nanomaterials, while Tendulkar became the first sportsperson to receive the honour. Their selection marked the first conferment after the award's scope was expanded in 2013 to cover achievements in any field.

Example: C. N. R. Rao received the Bharat Ratna in 2014 for contributions to solid-state and materials chemistry, including work on superconductors and nanomaterials.

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Bharat Rice

Bharat Rice is the subsidised rice brand retailed by the government through cooperative outlets to moderate retail rice prices. Sourced from FCI stocks, it is sold at a fixed price distinctly below prevailing market rates. For UPSC it completes the Bharat-brand trio for cereal price control.

Example: Its appearance in retail outlets during rice-price hardening shows the government's price-cooling toolkit.

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Bharat Small Modular Reactor (BSMR-200)

The Bharat Small Modular Reactor (BSMR-200) is a 200 MWe indigenous small modular reactor design being developed jointly by BARC and the Nuclear Power Corporation of India. It is derived from India's proven pressurised heavy water reactor technology, will use slightly enriched uranium fuel, and incorporates passive safety features that function without operator intervention during accidents. Backed by the 20,000 crore rupee Nuclear Energy Mission announced in the 2025-26 Union Budget, it aims to operationalise indigenous SMRs by 2033, with the lead unit proposed at the Tarapur site in Maharashtra.

Example: BSMR-200 units are intended as captive power plants for energy-intensive industries such as steel, aluminium and cement, and for repurposing retiring thermal power plants.

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Bharat Small Reactors

Bharat Small Reactors is the umbrella name for India's small modular reactor programme being developed by BARC under the Department of Atomic Energy. The programme covers multiple designs, including the 200 MWe BSMR-200, a 55 MWe SMR-55, and a high-temperature gas-cooled reactor of up to 5 MW thermal capacity meant for hydrogen generation. Supported by the Nuclear Energy Mission's 20,000 crore rupee allocation in the 2025-26 Budget, the programme is part of India's target of 100 GW of nuclear power capacity by 2047.

Example: The 55 MWe SMR-55 variant is aimed at flexible power supply for smaller industrial units and remote locations.

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Bharat Stage VI

Bharat Stage VI (BS-VI) refers to India's emission standards for motor vehicles, which set maximum permissible limits for pollutants such as nitrogen oxides, particulate matter, carbon monoxide and hydrocarbons in vehicle exhaust. India leapfrogged directly from BS-IV to BS-VI nationwide on 1 April 2020, skipping BS-V, making its norms among the strictest in the world at the time. The shift required cleaner BS-VI fuel with very low sulphur content and forced manufacturers to adopt technologies such as diesel particulate filters and selective catalytic reduction.

Example: BS-VI cut the permissible nitrogen oxide emissions from diesel cars to 80 mg per km, down from 250 mg per km under BS-IV.

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Bharat Vistar

Bharat Vistar is the variant name used in the article for Bharat-VISTAAR, the AI-powered multilingual farmer advisory platform. The naming variation itself illustrates why the scheme's exact official title matters for examinations. For UPSC, recognising Vistar as VISTAAR avoids confusion.

Example: A question on the 155261 helpline refers to Bharat-VISTAAR regardless of the Vistar shorthand.

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Bharat-VISTAAR

Bharat-VISTAAR (Virtually Integrated System to Access Agricultural Resources) is the 2026 AI-powered multilingual platform giving farmers voice-based advisories through the helpline 155261. Launched by the Agriculture Ministry, it integrates AgriStack, ICAR knowledge, IMD weather and scheme databases into one conversational system. For UPSC it is the flagship AI-for-farmers initiative.

Example: A farmer dialling 155261 and asking in Hindi about pest control on cotton receives an instant AI advisory.

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Bharat, under the One Nation One Fertiliser scheme

Under the One Nation One Fertiliser scheme, 'Bharat' is the single brand under which all subsidised fertilisers must be marketed across India. Launched as the Pradhan Mantri Bharatiya Jan Urvarak Pariyojana in October 2022, the scheme requires urea, DAP, MOP and NPK to carry the Bharat name to stop criss-cross movement of fertilisers and cut freight subsidy, with quality assurance under one standard. For UPSC, it is a key current-affairs example of subsidy reform, branding and logistics efficiency in agriculture.

Example: Prime Minister Narendra Modi launched the Bharat brand at the PM Kisan Samman Sammelan in New Delhi on 17 October 2022.

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Bharata Muni

Bharata Muni is the legendary sage credited with authoring the Natyashastra, the foundational Sanskrit treatise on theatre, dance and music. Tradition holds that he compiled divine knowledge of natya for human performers, and his work systematised acting, stagecraft, music and aesthetics for Indian performance arts. For UPSC art and culture, Bharata Muni is the name behind the rasa theory and the classical authority invoked by all Indian dance and theatre forms.

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Bharata's Natyashastra

Bharata's Natyashastra is the ancient Sanskrit treatise on the performing arts attributed to Bharata Muni, composed around the early centuries of the Common Era. Covering theatre, dance, music, acting, stagecraft and make-up, its most famous contribution is the rasa theory, which explains how audiences experience aesthetic emotion through eight rasas. For UPSC art and culture, it is the foundational text of classical Indian aesthetics and the authority behind the Natya Shastra-based dance forms.

Example: The eight rasas codified in the Natyashastra, from shringara to karuna, remain the aesthetic vocabulary of Bharatanatyam and Kathakali.

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Bharatanatyam is Tamil Nadu's

Bharatanatyam is the classical dance tradition of Tamil Nadu, rebuilt in the early twentieth century from the devadasi temple-dance heritage. It combines precise footwork, expressive abhinaya and Carnatic music in a fixed sequence from alarippu to tillana, and dancers are formally launched through the arangetram debut. It matters for UPSC as a flagship classical dance whose revival illustrates the national movement's recovery of Indian art forms.

Example: E. Krishna Iyer and Rukmini Devi Arundale led its twentieth-century revival from the sadir tradition.

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Bharatanatyam's

A possessive form referring to Bharatanatyam, the classical dance tradition of Tamil Nadu. In UPSC papers it signals that the attribute being asked about, such as a performer, composer or instrument, belongs to that dance school rather than to Kathak, Odissi or another form. Recognising the phrasing matters for prelims, where art-and-culture questions often turn on exactly which tradition a detail belongs to.

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BharatGen

BharatGen is India's sovereign multilingual artificial intelligence initiative, led by IIT Bombay, to build large language models trained on Indian languages, datasets and cultural contexts. It received 235 crore rupees from the Department of Science and Technology under the National Mission on Interdisciplinary Cyber-Physical Systems, plus 1,058 crore rupees from the Ministry of Electronics and IT under the IndiaAI Mission. In 2026 it unveiled Param-2, a 17-billion-parameter mixture-of-experts model covering 22 scheduled languages, and it operates through the BharatGen Technology Foundation, a Section-8 company registered in November 2025.

Example: BharatGen's domain models include Ayur Param for Ayurvedic knowledge, Agri Param for agriculture and Legal Param for Indian law.

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Bharatiya Antariksh Station

The Bharatiya Antariksh Station (BAS) is India's planned indigenous modular space station, announced by ISRO as a long-term goal following the Gaganyaan human spaceflight programme. The station is targeted for completion by 2035, with the first module planned for launch by 2028, and it will serve as an independent platform for long-duration human spaceflight, microgravity research and space technology development. It represents the next phase of India's human spaceflight ambitions and a step toward a sustained Indian crewed presence in low Earth orbit.

Example: ISRO plans to assemble the Bharatiya Antariksh Station in multiple modules, starting with the first module by 2028.

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Bharatiya Antariksh Station (BAS)

The Bharatiya Antariksh Station (BAS), literally the Indian Space Station, is ISRO's proposed crewed orbital station in low Earth orbit. Planned as a modular facility to be built up from a first module by 2028 to a fully operational station by 2035, it will give India an independent platform for long-duration human spaceflight, microgravity research and space technology development. It is a central element of ISRO's roadmap that extends from the Gaganyaan missions to a crewed lunar landing by 2040.

Example: The BAS will allow India to host Indian astronauts and conduct sustained microgravity experiments independently of the International Space Station.

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Bharatiya Nabhikiya Vidyut Nigam Limited (BHAVINI)

Bharatiya Nabhikiya Vidyut Nigam Limited (BHAVINI) is a public sector company under the Department of Atomic Energy tasked with constructing and operating India's fast breeder reactors. Its flagship project is the 500 MWe Prototype Fast Breeder Reactor (PFBR) at Kalpakkam in Tamil Nadu, a sodium-cooled reactor fuelled with uranium-plutonium mixed oxide (MOX) that breeds more fissile material than it consumes. BHAVINI's reactors form the crucial second stage of India's three-stage nuclear power programme.

Example: Once the Kalpakkam PFBR is fully operational, India will be only the second country after Russia operating a commercial-scale fast breeder reactor.

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Bharatiya Nyaya Sanhita, 2023

The Bharatiya Nyaya Sanhita, 2023 is the law that replaced the Indian Penal Code of 1860 from 1 July 2024. It reorganises offences, introduces terrorism as a defined offence under Section 113, and adds community service as punishment. It matters for internal security because terror, organised crime and mob lynching now have dedicated statutory definitions.

Example: Section 113 defining terrorist acts, replacing IPC provisions

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Bharatmala

Bharatmala is India's umbrella highway programme for building an interconnected national road network. Launched in 2017 by the Ministry of Road Transport and Highways, it envisages developing about 34,800 kilometres of roads, including economic corridors, border and coastal roads, and port-connectivity links. It matters for UPSC as a case study of infrastructure-led growth, lower logistics costs and the multimodal coordination now carried under PM Gati Shakti.

Example: The Delhi-Mumbai Expressway is being developed as a flagship greenfield corridor under the programme.

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Bharatmala Pariyojana

Bharatmala Pariyojana is the flagship road-building programme launched in 2017 to knit India's highways into economic corridors, inter-corridors and feeder routes. Spanning roughly 34,800 kilometres, it links industrial clusters, ports and border areas to cut freight time and logistics costs. It matters for UPSC as the largest highway programme in India's history, connecting questions on infrastructure finance, centre-state coordination and regional connectivity under PM Gati Shakti.

Example: Its approved Phase I covers about 24,800 kilometres of economic corridors, inter-corridors and feeder routes.

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BharatNet

BharatNet is the Government of India's flagship project to connect all Gram Panchayats with high-speed optical fibre broadband. Originally launched as the National Optical Fibre Network in 2011 and implemented by Bharat Broadband Network Limited, it aims to bridge the rural-urban digital divide by enabling e-governance, telemedicine, digital payments and online education in villages. For UPSC, it is the core example of digital infrastructure policy under Digital India.

Example: The project was later merged with BSNL, and its rollout underpins rural connectivity for services like UPI and teleconsultation.

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BharatNet plus rural UPI

BharatNet plus rural UPI describes the combined push of rural broadband connectivity and digital payments, where BharatNet's village-level optical fibre enables UPI transactions in the countryside. Together they extend cashless banking, direct benefit transfers and e-commerce to remote areas, turning connectivity into financial inclusion. For UPSC, the pairing is a model answer point on how digital infrastructure translates into grassroots economic empowerment under Digital India.

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Bharavi's

A possessive form referring to Bharavi, the sixth-century Sanskrit poet whose epic Kiratarjuniya is counted among the five great mahakavyas. In UPSC papers it signals that the work or style being asked about belongs to Bharavi rather than to Kalidasa or Bhavabhuti. Recognising the phrasing matters for prelims, where classical literature questions often turn on attributing a work to its correct author.

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Bharhut

Bharhut is a Buddhist stupa site in the Satna district of Madhya Pradesh, dating to the Sunga period of the second century BCE. Its carved stone railing is famous for medallions and pillars depicting Jataka tales, yakshas and nature spirits, much of which is now preserved in the Indian Museum at Kolkata. It matters for UPSC as a landmark of early Indian narrative sculpture, showing how Buddhist art carried stories to a wide public.

Example: The railing's carved medallions narrating the Jataka stories are among the earliest Indian stone reliefs of the Buddha's previous lives.

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Bhasa

Bhasa is one of the earliest known Sanskrit playwrights, predating Kalidasa, credited with about thirteen plays preserved in palm-leaf manuscripts found in Kerala. His best-known work is Svapnavasavadatta (The Dream of Vasavadatta), a romantic drama drawn from the Udayana legends. For UPSC, Bhasa is a favourite prelims question on ancient Indian literature and the history of Sanskrit drama.

Example: Svapnavasavadatta, his celebrated play about King Udayana and Queen Vasavadatta, was rediscovered among the Trivandrum manuscripts.

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Bhaskara II

Bhaskara II, also called Bhaskaracharya, is the twelfth-century Indian mathematician and astronomer who headed the observatory at Ujjain. His masterwork Siddhanta Shiromani contains the celebrated sections Lilavati on arithmetic and Bijaganita on algebra, alongside treatises on planetary motion. It matters for UPSC because he marks the classical peak of Indian mathematics, and his works were widely studied and translated in the medieval world.

Example: Lilavati has been used for centuries as a standard textbook of arithmetic in the Indian tradition.

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Bhaskaravarman of Kamarupa

Bhaskaravarman is the seventh-century king of Kamarupa, in present-day Assam, who ruled from about 600 to 650 CE as the last great ruler of the Varman dynasty. He allied with Harshavardhana of Kanauj against Shashanka of Gauda, and the Chinese pilgrim Xuanzang visited his court around 643 CE and praised his administration. It matters for UPSC as the link between ancient Assam and the wider political history of northern India.

Example: His Nidhanpur copper-plate grant is a key epigraphic source for the political geography of ancient Assam.

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Bhavabhuti

Bhavabhuti is the eighth-century Sanskrit dramatist patronised by Yasovarman of Kannauj. His surviving plays are Malatimadhava, Mahaviracharita and Uttararamacharita, the last a celebrated treatment of Rama's later life steeped in the karuna rasa of pathos. It matters for UPSC because he stands beside Kalidasa in the classical Sanskrit canon, and his work anchors questions on literature, aesthetics and royal patronage.

Example: Uttararamacharita is frequently cited as the finest Sanskrit expression of the karuna rasa.

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Bhavai

Bhavai is the folk theatre tradition of Gujarat, performed in village courtyards with music, dance and comic episodes drawn from religious stories and everyday life. It is traditionally credited to the fourteenth-century bard Asaita Thakar, and its plays, called vesha, often carry reformist themes mocking superstition and caste prejudice. It matters for UPSC as a living folk art showing how performance traditions spread social messages beyond classical culture.

Example: Bhavai troupes still tour rural Gujarat during festivals and fairs.

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Bhavantar Bharpai Yojana

The Bhavantar Bharpai Yojana is Haryana's price-compensation scheme for horticulture crops, run by the state's Horticulture Department. It fixes a protected price for covered fruits and vegetables, now 21 crops, and pays registered farmers the difference when market prices crash. For UPSC it extends the deficiency-payment idea from field crops to perishables.

Example: A potato farmer compensated when wholesale prices collapse below the protected price illustrates the scheme.

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Bherighosha

Bherighosha is the 'sound of war drums', Ashoka's term for conquest by military force. After the Kalinga war of 261 BCE, described in Major Rock Edict XIII, he declared that dhammaghosha, conquest through dhamma or moral example, would replace bherighosha as the state's guiding policy. It matters for UPSC because this declared shift anchors questions on Mauryan administration, the edicts and the ancient Indian debate over the ethics of war.

Example: Rock Edict XIII records Ashoka's remorse at Kalinga and his vow to pursue dhamma-vijaya instead.

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Bhikaji Cama

Bhikaji Cama is the Parsi revolutionary remembered as the mother of the Indian revolution for carrying the freedom struggle to the international stage. From exile in Paris and London she published the journal Bande Mataram and built networks of Indian revolutionaries in Europe. For UPSC, she represents the international dimension of the national movement and the role of women in revolutionary nationalism.

Example: At the International Socialist Congress in Stuttgart in 1907 she unfurled a tricolour flag of Indian independence, an early forerunner of the national flag.

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Bhilai

Bhilai is the industrial city in Chhattisgarh built around the Bhilai Steel Plant, one of India's first public-sector integrated steel plants. Set up with Soviet assistance during the Second Five Year Plan and commissioned in 1959, the plant became India's first and main producer of steel rails. For UPSC, Bhilai exemplifies Nehruvian heavy industrialisation and the plan-era model of state-led development.

Example: President Rajendra Prasad inaugurated the plant's first blast furnace on 4 February 1959, a symbolic moment of the Second Plan.

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Bhima Bai Holkar

Bhima Bai Holkar is the daughter of Yashwantrao Holkar who fought the British during the Third Anglo-Maratha War. At the Battle of Mahidpur on 21 December 1817 she led a brigade of about 2,500 cavalry, and after the Treaty of Mandsaur of January 1818 she refused its terms and continued guerrilla resistance. It matters for UPSC as an example of women's military leadership in the pre-1857 resistance to British rule.

Example: Rani Lakshmibai of Jhansi is recorded to have drawn inspiration from Bhimabai during the 1857 uprising.

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Bhimbetka

Bhimbetka is a group of rock shelters in the Raisen district of Madhya Pradesh bearing prehistoric paintings that range from the Mesolithic to the historic period. Discovered by V. S. Wakankar in 1957, the shelters show hunting scenes, dances and evidence of continuous human habitation, and were listed by UNESCO in 2003. It matters for UPSC as India's premier window into prehistoric art and the deep continuity of settlement on the subcontinent.

Example: The 'Zoo Rock' shelter displays hundreds of painted animals spanning nearly every period of the site's use.

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Bhitargaon

Bhitargaon is a fifth-century brick temple near Kanpur in Uttar Pradesh, belonging to the Gupta period. It is among the earliest surviving brick Hindu temples with a shikhara tower, and its walls carry terracotta panels depicting gods, goddesses and mythological scenes. It matters for UPSC as a benchmark monument for the evolution of the Nagara style, tracing the move from flat-roofed shrines to towered temples.

Example: Its terracotta panels survive as some of the earliest narrative reliefs on a Gupta temple.

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Bhitari pillar inscription

The Bhitari pillar inscription is the Sanskrit record of the Gupta emperor Skandagupta (reigned c. 455-467 CE), engraved on a pillar at Bhitari in present-day Ghazipur, Uttar Pradesh. In nineteen lines it narrates his genealogy and celebrates his victories over the Pushyamitras and, crucially, the Hunas, making it the key epigraphic source for the Gupta-Huna wars. For UPSC, it is a classic GS-1 ancient history prelims fact on Gupta epigraphy.

Example: Skandagupta's checking of the Huna advance on the Indus, c. 458 CE

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Bhonsle

The Bhonsles are a Maratha ruling house that held power at Nagpur from the early eighteenth century. Under Raghoji Bhonsle they built a kingdom centred on Berar and parts of central India, standing alongside the Peshwas, Scindias and Holkars as one of the great Maratha powers. It matters for UPSC because the Bhonsle state illustrates the federal character of the Maratha confederacy and the politics of the Third Anglo-Maratha War, after which Nagpur fell under British control.

Example: The British defeat of the Bhonsles at Sitabuldi in 1817 ended their resistance in the Third Anglo-Maratha War.

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Bhoodan

Bhoodan is the land-gift movement launched by Vinoba Bhave on 18 April 1951 at Pochampally in Telangana, when a landlord donated one hundred acres to landless villagers. Vinoba walked across India asking landowners to give part of their land voluntarily, later extending the idea to gramdan, the gift of whole villages. It matters for UPSC as the great non-violent agrarian experiment after independence and a landmark of the Sarvodaya tradition.

Example: At its peak the movement had received several million acres in pledged land gifts.

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Bhoodan (land-gift) Movement

The Bhoodan land-gift movement is Vinoba Bhave's campaign, begun in 1951, to end landlessness through voluntary donation rather than state coercion. Walking from village to village, he appealed to landowners to part with a portion of their holdings for the landless, framing the effort as Sarvodaya, the welfare of all. It matters for UPSC as a contrast case to legislation-led land reforms and a staple of questions on post-independence social movements.

Example: The first gift of one hundred acres came from the landlord Vedire Ramachandra Reddy at Pochampally.

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BhooKamp app

The BhooKamp app is the National Centre for Seismology's mobile application that disseminates earthquake information and alerts to the public in real time.

Example: users receive push notifications with magnitude, location and depth within minutes of a tremor

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Bhopal gas tragedy

The Bhopal gas tragedy is the industrial disaster of the night of 2-3 December 1984, when methyl isocyanate leaked from the Union Carbide pesticide plant in Bhopal, Madhya Pradesh. Thousands died in the immediate aftermath and hundreds of thousands suffered lasting health effects, making it the world's worst industrial accident. It matters for UPSC for questions on industrial safety, corporate liability, disaster management and environmental law.

Example: The 1989 settlement of 470 million dollars paid by Union Carbide remains a reference point for compensation law in India.

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Bhore Committee

The Bhore Committee is the Health Survey and Development Committee appointed in 1943 under Sir Joseph Bhore, which submitted its landmark report in 1946 in four volumes. It recommended integrating preventive and curative services at every level and building primary health centres, one for every 40,000 people, as the foundation of a national health system. It matters for UPSC because its blueprint shaped India's post-independence health planning and the First Five-Year Plan.

Example: Its primary-health-centre proposal became the template for rural health services after 1947.

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Bhorghat

Bhorghat is the steep railway incline on the Mumbai-Pune section in Maharashtra, cutting through the Western Ghats between Karjat and Khandala. Built in the colonial era as part of the Great Indian Peninsular Railway, it was an engineering landmark of nineteenth-century railway construction in India. It matters for UPSC as an example of how railways opened the Deccan plateau to the coast, shaping trade routes and the growth of cities.

Example: Reversing stations on the incline let trains climb the steep Ghat section safely.

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Bhukti

Bhukti is an ancient Indian administrative term for a province or large territorial division, used under the Mauryas and more systematically under the Guptas. A bhukti was subdivided into vishayas or districts, placing it near the top of the imperial administrative hierarchy. It matters for UPSC because the bhukti-vishaya structure is the standard model asked about in questions on Mauryan and Gupta governance.

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Bhuktis

A plural reference to bhukti, the provincial divisions of the Mauryan and Gupta administrative systems, each subdivided into districts called vishayas. In UPSC papers the plural signals a question about the tiered structure of ancient imperial administration rather than about any single province. Recognising the term matters for polity questions on how the Mauryas and Guptas organised and controlled large territories.

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Bhulabhai Desai

Bhulabhai Desai is the Indian nationalist leader and eminent lawyer best known as the chief defence counsel in the 1945 Indian National Army trials at the Red Fort. Leading a distinguished team, he argued that the INA men were prisoners of war who had fought for their country's freedom. It matters for UPSC because the INA trials became a powerful rallying point for the freedom movement in its final phase.

Example: He was assisted by Tej Bahadur Sapru and Kailash Nath Katju in the defence team.

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Bhumija

Bhumija is a style of temple architecture that developed in central India under the Paramaras between the eleventh and thirteenth centuries. It features a star-shaped ground plan and a curvilinear shikhara built up from rows of miniature tower motifs. It matters for UPSC because it is a distinct regional variant of the Nagara style, and identifying its features is a staple of art-and-culture questions on temple architecture.

Example: The Bhojeshwar temple at Bhojpur in Madhya Pradesh is a celebrated Paramara-period example of the style.

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Bhuria Commission

The Bhuria Committee, headed by Dileep Singh Bhuria, was appointed in 1994 to recommend how panchayati raj could be extended to Scheduled Areas. Its 1995 report proposed wide-ranging autonomy for tribal gram sabhas over land, forests, minor forest produce and village markets, and became the foundation of the Panchayats (Extension to Scheduled Areas) Act, 1996. For UPSC it is the key link between tribal self-governance and the Fifth Schedule.

Example: PESA's requirement of gram sabha consent before land acquisition flows from Bhuria's recommendations.

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Bhuvan platform

The Bhuvan platform is ISRO's geo-portal that provides satellite imagery and thematic maps for applications including crop monitoring and watershed planning. Agriculture departments use its data for acreage estimation and drought assessment. For UPSC it is the space-data backbone of agri-governance.

Example: District officials delineating drought-affected blocks on Bhuvan imagery demonstrate its administrative use.

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Bhuyan and Juang

A reference to the Bhuyan and Juang tribal communities of the Keonjhar region of Odisha, whose uprisings of 1867-68 and 1891 challenged British interference in succession and land matters. In UPSC papers the pairing signals questions on nineteenth-century tribal revolts rather than on either community alone. It matters for prelims lists of tribal movements and their leaders, such as Ratna Nayak of the first Keonjhar uprising.

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Bhuyan and Juang rebellions (1867-91), Odisha

The Bhuyan and Juang rebellions are the tribal uprisings of Keonjhar in Odisha, first in 1867-68 led by Ratna Nayak against the British-backed installation of Dhanurjaya Bhanja, and again in 1891 under Dharanidhar Nayak. They defended the tribes' customary role in choosing their raja and resisted colonial revenue and forest policies. They matter for UPSC as classic cases of tribal resistance to the colonial disruption of traditional authority.

Example: Ratna Nayak was captured and executed in 1868 after the first uprising was crushed with troops drawn from neighbouring states.

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Biafra

Biafra is the secessionist state declared in southeastern Nigeria in 1967, triggering a civil war that lasted until 1970. The Nigerian blockade produced a famine that killed over a million people and shocked world opinion, becoming one of the first televised humanitarian crises. It matters for UPSC because it is the classic case study of secession, ethnic conflict and the politics of humanitarian intervention in international relations.

Example: The airlift of relief supplies to Biafra in 1968-69 marked a turning point in modern humanitarian action.

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Bias and discrimination

In the context of artificial intelligence, bias and discrimination refer to systematic errors in AI systems that produce unfairly skewed outcomes against particular groups. Such bias typically originates in unrepresentative training data, flawed labelling, or design choices that encode historical inequalities, and it is a central concern in AI ethics and governance. Regulators worldwide are responding with requirements for fairness audits, transparency and accountability in high-stakes AI applications such as hiring, lending and law enforcement.

Example: An experimental AI recruitment tool developed by Amazon was found to systematically downgrade CVs containing the word 'women's', illustrating gender bias learned from historical hiring data.

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Bias reduction in evaluation

A reference to techniques for limiting partiality when judging performance, common in UPSC ethics questions on appraisal, recruitment and decision-making. Methods include anonymised assessment, structured criteria, diverse panels and blind review. It matters for GS Paper IV because impartiality is a foundational value of the civil services, and answers on administrative ethics are expected to show how discretion can be checked by institutional design.

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Bibi ka Maqbara

Bibi ka Maqbara is the mausoleum of Dilras Banu Begum, the wife of the Mughal emperor Aurangzeb, at Aurangabad in Maharashtra. Commissioned in 1660 by her son Azam Shah, it consciously echoes the Taj Mahal on a smaller scale and is often called the 'Taj of the Deccan'. It matters for UPSC as a marker of later Mughal architecture and of the shift of imperial attention toward the Deccan.

Example: It was designed by Ata-ullah, son of the Taj Mahal's architect Ustad Ahmad Lahori.

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Bicarbonate buffer

carbonic acid and bicarbonate ions in blood that absorb excess acid or base to hold pH steady.

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Bidar

Bidar is the Karnataka city that became the Bahmani capital in 1429 when Ahmad Shah I shifted his court there, and it remained the Deccan's political centre under the Bahmanis and the Barid Shahis. Its fort, madrasa, and tombs blend Persian and Deccan styles, and it gave its name to Bidriware, the inlaid metal craft with a GI tag. UPSC medieval-history questions use Bidar to anchor the Bahmani Sultanate.

Example: Bidar Fort and the Mahmud Gawan madrasa (15th century), exemplars of Bahmani architecture in the Deccan

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Bidar — Barid Shahis

The Barid Shahis are the dynasty that ruled the small sultanate of Bidar in the central Deccan from 1492 to 1619. Founded by Qasim Barid, the Bahmani prime minister who became its de facto ruler, it was his grandson Ali Barid who first assumed the royal title of Shah in 1542. It matters for UPSC as one of the five Deccan sultanates born from the Bahmani breakup, and Bijapur's annexation of Bidar in 1619 is a standard prelims fact.

Example: Ali Barid fought on the side of the Deccan alliance at the Battle of Talikota in 1565.

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Bidar Fort

Bidar Fort is the hill fort at Bidar in Karnataka that served as the capital stronghold of the Bahmani Sultanate after Ahmad Shah shifted his capital there from Gulbarga in 1430. It later passed to the Adil Shahis, was captured by Aurangzeb in 1656 and became part of the Nizam's dominions in 1724. It matters for UPSC because its history tracks the Deccan sultanates and the Mughal advance into the Deccan.

Example: Its madrasa, built by Mahmud Gawan, was one of the great centres of Islamic learning in the Deccan.

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Bidriware

Bidriware is the metal inlay craft of Bidar in Karnataka, made by inlaying silver and sometimes gold into a dark zinc-copper alloy. Brought to the Deccan by Persian artisans during the Bahmani period, it is used for vases, boxes, hookah bases and jewellery. It matters for UPSC as a Geographical Indication-tagged handicraft that anchors questions on traditional crafts, artisan livelihoods and cultural heritage schemes.

Example: The craft holds a Geographical Indication tag recognising Bidar as its home.

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Biennio Rosso

Biennio Rosso, Italian for the 'two red years', is the period of 1919-20 marked by mass strikes, factory occupations and peasant land seizures in Italy after the First World War. Workers in Turin and Milan ran occupied factories through councils, and the unrest briefly raised the prospect of revolution. It matters for UPSC because the Biennio Rosso is the standard example used in world-history questions on post-war radicalism and the conditions that fed the rise of fascism.

Example: The occupation of Fiat's factories in Turin in 1920 is the movement's most famous episode.

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BIFR

BIFR is the Board for Industrial and Financial Reconstruction, set up in January 1987 under the Sick Industrial Companies (Special Provisions) Act, 1985 to identify sick industrial companies and devise revival or winding-up schemes. A company was deemed sick when accumulated losses exceeded its net worth, and promoters often used BIFR references to stall creditors. It was dissolved in December 2016, with cases moving to the NCLT under the IBC. For UPSC, it is the pre-IBC regime for industrial sickness.

Example: The Insolvency and Bankruptcy Code, 2016 replaced the BIFR and SICA regime with time-bound resolution through the National Company Law Tribunal.

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BIFR (Board for Industrial and Financial Reconstruction) was

The BIFR (Board for Industrial and Financial Reconstruction) was the quasi-judicial body set up under the Sick Industrial Companies (Special Provisions) Act, 1985 to identify sick industrial companies and order their revival, rehabilitation, merger or winding up. It became the forum for corporate sickness resolution until SICA was repealed and the body wound up after the Insolvency and Bankruptcy Code, 2016 took over. For UPSC, BIFR is a GS-3 economy marker in the evolution of India's insolvency regime.

Example: The Sick Industrial Companies (Special Provisions) Act, 1985

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Big Bang theory

The Big Bang theory is the leading scientific explanation for the origin of the universe. It states that about 13.8 billion years ago all matter and energy were concentrated in an extremely hot, dense state, which began expanding. As the universe cooled, atoms, stars and galaxies formed over billions of years. It is supported by the cosmic microwave background and the observed expansion of galaxies. For UPSC, it is the foundation of cosmology questions in GS-3 and prelims science.

Example: the detection of cosmic microwave background radiation by Arno Penzias and Robert Wilson in 1965

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biggest tank battles since World War II

The biggest tank battles since World War II is a description of the Battle of Chawinda, fought during the Indo-Pakistan War of 1965 in the Sialkot sector. India's 1st Armoured Division clashed with Pakistan's 6th Armoured Division over several days, involving hundreds of tanks. For UPSC, it illustrates the armoured dimension of the 1965 war, fought after Pakistan's Operation Gibraltar and Grand Slam.

Example: Battle of Chawinda, September 1965

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Bihar

This is a text-extraction artefact rather than a standalone key term: Bihar is a state in eastern India, and the word was highlighted in a source article only as a geographical reference, not as a concept needing definition. No separate definition applies here. Readers interested in Bihar-related topics, such as its demand for special category status or its caste survey, should follow the discussion in the article where the term appeared.

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Bihar famine of 1873-74

The Bihar famine of 1873-74 is a severe drought that struck Bihar and eastern Uttar Pradesh in the early 1870s. Unlike earlier famines, the colonial administration mounted a large organized relief effort with public works and grain kitchens under officials such as Sir Richard Temple, so recorded mortality remained low. The experience shaped the first systematic famine administration and informed the later Famine Codes. For UPSC, it is important in colonial economic history and the evolution of famine relief policy.

Example: the large-scale relief works and food kitchens organized by the colonial administration in Bihar in 1873-74

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Bihar Land Reforms Act, 1950

The Bihar Land Reforms Act, 1950 is India's first major land-reform legislation, passed by Bihar soon after independence. It abolished zamindari and other intermediary interests, transferring estates to the state so that tenants paid rent directly to the government. Legal challenges by zamindars led to the First Amendment of 1951, which placed such laws under the Ninth Schedule. For UPSC, it is a landmark in post-independence agrarian reform and constitutional amendment history.

Example: the Kameshwar Singh v. State of Bihar case of 1952, which upheld the abolition of zamindari

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Bihar Movement

The Bihar Movement is the 1974-75 mass agitation in Bihar led by Jayaprakash Narayan against corruption, price rise and misgovernance. Beginning as a student protest, it grew into his call for Sampoorna Kranti or Total Revolution, demanding systemic moral and political change. The movement spread across India and its confrontation with the Indira Gandhi government culminated in the Emergency of 1975. For UPSC, it is central to modern Indian history and questions on the Emergency and democratic movements.

Example: Jayaprakash Narayan's call for Total Revolution at Gandhi Maidan, Patna, on 5 June 1974

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Bihar under the octogenarian zamindar Kunwar Singh

Kunwar Singh is the octogenarian zamindar of Jagdishpur in Bihar who led the Revolt of 1857 in the region at about 80 years of age. Despite his age, he organized rebel forces, recaptured Arrah from the British, and carried the revolt into eastern Uttar Pradesh, fighting at Lucknow and Azamgarh. He died in April 1858 from wounds sustained in battle. For UPSC, he is a celebrated figure of the 1857 revolt and Bihar's freedom-struggle heritage.

Example: his recapture of Arrah in July 1857 during the Revolt

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Bihu

Bihu is the principal harvest festival of Assam, celebrated by the Assamese people with dance, folk songs and feasts. It is observed in three forms: Rongali or Bohag Bihu in spring marking the Assamese New Year, Kongali or Kati Bihu in autumn, and Bhogali or Magh Bihu after the winter harvest. The Bihu dance and songs are iconic expressions of Assamese folk culture. For UPSC, it is a staple of art-and-culture questions on Indian festivals.

Example: Rongali Bihu, celebrated in mid-April as the Assamese New Year

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Bijaganita

Bijaganita is Bhaskara II's treatise on algebra, composed around 1150 CE as part of his larger work Siddhanta Shiromani. It systematically treats zero, negative numbers, surds, indeterminate equations and quadratic equations, including the chakravala method of solving Pell's equation. The work shows the advanced state of Indian mathematics in the medieval period. For UPSC, it is important in ancient and medieval Indian science and the history of mathematics.

Example: Bhaskara II's chakravala method for solving indeterminate quadratic equations

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Bijak

Bijak is the principal collection of the verses of Kabir, the 15th-century Bhakti saint, compiled by his followers after his death. Written in sadhukkadi, a mix of Hindi dialects, it contains dohas, sakhis and ramainis that attack caste distinctions, idol worship and empty ritualism while preaching devotion to a formless God. For UPSC, it is a key text of the Bhakti movement and its challenge to social orthodoxy.

Example: Kabir's doha 'Bura jo dekhan main chala, bura na miliya koi'

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Bijapur

Bijapur is a city in northern Karnataka that served as the capital of the Adil Shahi dynasty from the late 15th to the late 17th century. Originally a Yadava settlement, it became the seat of a Bahmani governor before emerging as an independent sultanate. The city is celebrated for Indo-Islamic monuments, most famously the Gol Gumbaz. For UPSC, it is central to Deccan history, medieval architecture and the Deccan Sultanates.

Example: the Gol Gumbaz, tomb of Muhammad Adil Shah, in Bijapur

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Bijapur — Adil Shahis

The Adil Shahis are the Shia dynasty that ruled Bijapur from 1489 to 1686, founded by Yusuf Adil Shah after the break-up of the Bahmani kingdom. They were noted patrons of art, literature and architecture, producing the Gol Gumbaz and the Ibrahim Rauza, and Ibrahim Adil Shah II was called Jagadguru Badshah for his cultural syncretism. The dynasty ended when Aurangzeb annexed Bijapur in 1686. For UPSC, it is key to the Deccan Sultanates and medieval Indo-Islamic architecture.

Example: the Gol Gumbaz, completed in 1656 under Muhammad Adil Shah

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Bijapur, Golconda, Ahmadnagar and Bidar

Bijapur, Golconda, Ahmadnagar and Bidar are four of the five Deccan Sultanates that emerged from the disintegration of the Bahmani kingdom in the late 15th and early 16th centuries, the fifth being Berar. Ruled respectively by the Adil Shahis, Qutb Shahis, Nizam Shahis and Barid Shahis, they dominated Deccan politics through shifting alliances. For UPSC, their relations with Vijayanagara and the Mughals are central to medieval Indian history.

Example: their combined victory over Vijayanagara at the Battle of Talikota in 1565

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bilateral investment treaty

Bilateral investment treaty (BIT) is an agreement between two countries setting out protections for investors, such as fair and equitable treatment, protection from expropriation, and investor-state dispute settlement. India terminated most of its old BITs and adopted a new Model BIT in 2016 restricting investor-state arbitration. For UPSC GS-2 and GS-3, BITs link foreign investment, trade policy, and sovereignty debates.

Example: India's Model Bilateral Investment Treaty, 2016

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bilaterally

Bilaterally is an adverb meaning through direct dealings between two parties, as opposed to multilaterally among many. In UPSC international relations, it describes India resolving issues with one country at a time, such as trade talks or border negotiations, contrasted with forums like the UN or WTO. It carries no technical definition; its value is in framing answers on diplomacy, treaties, and trade negotiations.

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Bilgram/Kannauj

Bilgram, near Kannauj in Uttar Pradesh, is the site of the Battle of Kannauj fought in May 1540, where Sher Shah Suri decisively defeated the Mughal emperor Humayun. The defeat ended Humayun's first reign and forced him into a fifteen-year exile in Persia, while Sher Shah established the Sur Empire and its famed administrative reforms. For UPSC, it is a turning point of medieval Indian history between the first Mughal and Sur phases.

Example: Sher Shah Suri's victory over Humayun at the Battle of Kannauj in May 1540

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Bilhana

Bilhana is the eleventh-century Sanskrit poet from Kashmir who became court poet of the Western Chalukya king Vikramaditya VI at Kalyana. His mahakavya Vikramankadevacarita is a historical biography of his patron, prized as a source for Chalukya history, while his love poem Caurapancasika is a classic of Sanskrit lyric poetry. For UPSC, he is a standard question on court literature as historical source material.

Example: His court epic Vikramankadevacarita chronicles the reign of Vikramaditya VI (1076 to 1126 CE), including his wars with the Chola king Kulottunga I.

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bilingual legends

Bilingual legends are inscriptions in two languages on ancient Indian coins, most famously the Greek and Kharosthi or Brahmi legends on Indo-Greek coins. They show rulers communicating legitimacy to diverse subjects and provide crucial evidence for reconstructing Indo-Greek chronology. For UPSC ancient history prelims, bilingual coins are a standard fact illustrating the fusion of Hellenistic and Indian traditions.

Example: Coins of Indo-Greek king Menander I bearing Greek and Kharosthi legends

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Bill of Rights

The Bill of Rights is the first ten amendments to the United States Constitution, ratified in 1791, guaranteeing fundamental liberties such as freedom of speech, religion and the press, protection against unreasonable searches, and due process of law. It became the model for written guarantees of individual rights in modern constitutions. For UPSC, it is important in comparative constitutionalism, as India's Fundamental Rights drew directly on this tradition.

Example: the first ten amendments to the US Constitution, ratified in 1791

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Bimbisara

Bimbisara is the founder of the Haryanka dynasty and king of Magadha in the 6th century BCE, during the age of the Mahajanapadas. He made Rajagriha his capital, expanded Magadha through matrimonial alliances and conquest, and was a contemporary and patron of both Mahavira and the Buddha. He was deposed and starved to death by his son Ajatashatru. For UPSC, he marks the rise of Magadha and the second urbanization of ancient India.

Example: his patronage of the Buddha and establishment of Rajagriha as the Magadhan capital

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BIMSTEC

BIMSTEC is the Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation, a regional grouping founded in 1997 with seven members: India, Bangladesh, Myanmar, Sri Lanka, Thailand, Nepal, and Bhutan. Its secretariat is in Dhaka. For UPSC, BIMSTEC matters because India promotes it as a practical alternative to a stalled SAARC, anchoring its Act East policy and Bay of Bengal connectivity.

Example: The BIMSTEC Charter, adopted at the 2022 Colombo summit, gave the grouping a formal institutional foundation for the first time.

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BIMSTEC Disaster Management Exercise

The BIMSTEC Disaster Management Exercise is the joint simulation exercise of the Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation, testing regional coordination in disaster response. India has hosted editions bringing together member states' response forces.

Example: the exercise practises cross-border search, rescue and relief coordination among BIMSTEC members

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Bina Das

Bina Das is the Bengali revolutionary who attempted to assassinate the Governor of Bengal, Stanley Jackson, at the Calcutta University convocation on 6 February 1932. A member of the Chhatri Sangha women's organisation, she fired five shots in protest against colonial repression and was sentenced to nine years of rigorous imprisonment. For UPSC, she illustrates the prominent role of women in revolutionary nationalism.

Example: After her release she joined the Congress, took part in the Quit India Movement and remained imprisoned until 1945.

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Bindusara

Bindusara is the second Mauryan emperor, son of Chandragupta Maurya and father of Ashoka, who ruled around 297 to 273 BCE. Known to Greek writers as Amitrochates, he maintained the vast Mauryan empire and continued diplomatic contacts with the Hellenistic world, receiving the ambassador Deimachos from Antiochus I. For UPSC, he forms the bridge between Chandragupta's foundation of the empire and Ashoka's expansion in Mauryan history.

Example: the Greek ambassador Deimachos at his court, sent by the Seleucid ruler Antiochus I

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Bio-AI hubs

Bio-AI hubs are research centres established under India's BioE3 policy and its Bio-RIDE scheme to combine artificial intelligence with biology for solving complex biological challenges. They bring together multidisciplinary teams from academia and industry to work on data-driven research in areas such as biomolecular design, sustainable agriculture, synthetic biology, Ayurveda and genome diagnostics. The hubs are meant to bridge the gap between laboratory research and market-ready biomanufacturing.

Example: Under the BioE3 policy, Bio-AI 'moolankur' hubs were announced to apply AI to challenges in health, agriculture and environment.

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bio-ink

A bio-ink is the printable material used in 3D bioprinting: living cells suspended in a supportive biomaterial, usually a hydrogel, formulated to flow through a printer nozzle and then hold its shape. A good bio-ink must be printable, biocompatible, and able to keep cells alive and functioning after printing.

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Bio-piracy

the unauthorised commercial use of a country's biological samples or genetic resources by external firms without fair compensation; a key risk cited against unregulated biobanking.

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Bio-RIDE

Bio-RIDE (Biotechnology Research Innovation and Entrepreneurship Development) is the consolidated umbrella scheme of the Department of Biotechnology, formed by merging two earlier DBT schemes and adding a new component on biomanufacturing and biofoundry. Approved by the Union Cabinet in 2025, it funds research, innovation and entrepreneurship across biotechnology while specifically supporting the high-performance biomanufacturing goals of the BioE3 policy. It represents the main implementation vehicle for translating biotech research into industrial products.

Example: The Department of Biotechnology and BIRAC issued a joint call for proposals to establish Bio-AI 'moolankur' hubs under Bio-RIDE and the BioE3 policy.

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bio-shields

Bio-shields are coastal ecosystems, principally mangroves, that act as natural barriers against storms, cyclones and tsunamis. Their dense root systems and canopies dissipate wave energy, trap sediment, stabilise shorelines and reduce storm-surge damage to coastal communities, at a fraction of the cost of engineered sea walls. They also double as blue-carbon sinks and nurseries for fisheries, which is why their conservation is a priority in climate adaptation planning.

Example: Mangrove belts in Odisha and West Bengal buffered coastal villages during recent Bay of Bengal cyclones; India holds nearly 5,000 sq km of mangroves, the largest extent in West Bengal.

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Bioaccumulation

Bioaccumulation is the build-up of nanoparticles in organs such as the liver, spleen, lungs and brain over time. Its long-term health effects are not yet known.

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Biobank

a structured repository that collects, processes and stores biological samples such as DNA, blood, tissues and cells along with associated health data; it powers diagnosis, targeted-drug development, population studies and predictive health modelling.

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Biochemical Oxygen Demand (BOD)

Biochemical Oxygen Demand is the amount of dissolved oxygen required by microorganisms to break down organic matter in a water sample over a specified period, usually five days at 20 degrees Celsius (BOD5). It is a key indicator of organic pollution: the higher the BOD, the more polluted the water, because decomposing organic waste consumes the oxygen that aquatic life needs. BOD is a standard parameter in water quality monitoring and effluent discharge norms under India's environmental regulations.

Example: Clean river water typically has a BOD below 5 mg per litre, while untreated sewage can exceed 200 mg per litre.

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biodiversity

Biodiversity is the variety of life on Earth at three levels: genetic diversity within species, species diversity across ecosystems, and ecosystem diversity across landscapes. It underpins ecosystem services such as pollination, water purification, soil fertility and climate regulation, making it the foundation of agriculture, fisheries and human well-being. India, one of the world's 17 mega-diverse countries, protects biodiversity through the Biological Diversity Act, 2002 and a network of protected areas.

Example: The Western Ghats' rich assemblage of endemic amphibians is an example of high species and genetic diversity.

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Biodiversity cool spot

A biodiversity cool spot is an area where high species diversity survives under heavy human pressure, the mirror image of a biodiversity hotspot.

Example: Urban woodlands and floodplain wetlands that shelter rare species inside city limits.

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biodiversity hotspot

A biodiversity hotspot is a biogeographic region that contains at least 1,500 endemic vascular plant species and has lost at least 70% of its original habitat, making it both irreplaceable and severely threatened. The concept, introduced by Norman Myers, now covers 36 hotspots worldwide that hold most of Earth's endemic species on a small fraction of land, guiding conservation prioritisation. India hosts four hotspots: the Himalaya, the Western Ghats, Indo-Burma and Sundaland (the Nicobar Islands).

Example: The Western Ghats qualify as a hotspot because of exceptional endemism in amphibians, reptiles and flowering plants combined with heavy habitat loss.

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biodiversity hotspots

Biodiversity hotspots are biogeographic regions with exceptional species richness and high endemism that have lost at least 70 percent of their original habitat, a concept introduced by Norman Myers. Conservation International recognises 36 hotspots globally, four of them partly or wholly in India. For UPSC environment prelims, hotspots are a high-frequency topic linked to endemic species, protected areas, and conservation strategy.

Example: The Western Ghats, a biodiversity hotspot shared with Sri Lanka

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Biodiversity law

Biodiversity law refers to the body of national and international legal instruments governing the conservation and sustainable use of biological diversity. In India it centres on the Biological Diversity Act, 2002 (amended in 2023), supported by the Wildlife (Protection) Act, 1972 and the Forest (Conservation) Act, 1980, while internationally it is anchored in the Convention on Biological Diversity (1992) and its Nagoya Protocol on access and benefit sharing. Together these laws regulate who can access biological resources, how benefits from their use are shared with local communities, and how species and habitats are protected.

Example: India's Biological Diversity Act implements the country's obligations under the Convention on Biological Diversity through the National Biodiversity Authority, State Biodiversity Boards and local Biodiversity Management Committees.

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Biodiversity Management Committees (BMCs)

Biodiversity Management Committees are statutory bodies constituted by local bodies such as gram panchayats and municipalities under the Biological Diversity Act, 2002. Their main functions are to promote conservation and sustainable use of local biological resources and to prepare People's Biodiversity Registers documenting local flora, fauna and traditional knowledge. They form the grassroots tier of India's three-level biodiversity governance structure, alongside the National Biodiversity Authority and State Biodiversity Boards.

Example: A village BMC prepares a People's Biodiversity Register listing local crop varieties, medicinal plants and the traditional knowledge associated with them.

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BioE3 Policy

The BioE3 Policy, short for Biotechnology for Economy, Environment and Employment, was approved by the Union Cabinet in August 2024 to foster high-performance biomanufacturing in India. It provides innovation-driven support for research, development and entrepreneurship across six thematic areas, including bio-based chemicals, precision biotherapeutics, climate-resilient agriculture and carbon capture. The policy aims to grow India's bioeconomy from over 130 billion US dollars in 2024 toward 300 billion dollars by 2030, supporting net-zero and green growth goals.

Example: Under BioE3, the government is establishing biomanufacturing facilities, bio-AI hubs and biofoundries to take biotech innovations from lab to market.

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bioeconomy

The bioeconomy is the part of the economy based on biological resources and processes: agriculture, forestry, fisheries, food, biofuels, bioplastics, biotechnology products and bio-based services. It offers a pathway to decouple growth from fossil resources by valorising renewable biomass and waste streams into fuels, materials and medicines. India has set a target of a 300 billion dollar bioeconomy by 2030, backed by the BioE3 policy promoting high-performance biomanufacturing.

Example: Ethanol blending in petrol and enzyme-based bioplastics are everyday outputs of the bioeconomy.

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Bioenergy

Bioenergy is renewable energy derived from organic materials, or biomass, such as agricultural residues, animal waste, forest byproducts and dedicated energy crops. It can be converted into heat, electricity or transport fuels through combustion, anaerobic digestion or biochemical processes, and it is considered carbon-neutral over its lifecycle because the carbon released was recently absorbed by the plants. In India, bioenergy is a key pillar of the energy transition, with programmes promoting biomass power, biogas plants and compressed biogas.

Example: Punjab's biomass power plants generate electricity from paddy straw, tackling both farm waste burning and energy needs.

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Biofuels

Biofuels are liquid or gaseous fuels produced from biomass, such as ethanol from sugarcane or maize and biodiesel from non-edible oils like jatropha or used cooking oil. They are blended with petrol and diesel to reduce fossil fuel imports and greenhouse gas emissions, and India classifies them into generations based on feedstock, from food crops (first generation) to agricultural waste (second generation). The flagship programme is ethanol blending, with India achieving 20 percent ethanol blending in petrol (E20) in 2025.

Example: India's E20 programme blends 20 percent ethanol, largely produced from sugarcane molasses and maize, into petrol to cut oil imports and emissions.

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Biogeochemical cycles

Biogeochemical cycles are the natural pathways by which essential elements such as carbon, nitrogen, phosphorus, sulphur and water move between the living and non-living components of the Earth. Through processes like photosynthesis, respiration, decomposition and weathering, these cycles continuously recycle nutrients among the atmosphere, hydrosphere, lithosphere and biosphere. Human activities, including fossil fuel burning and fertiliser use, are disrupting these cycles, driving climate change, ocean acidification and eutrophication.

Example: The nitrogen cycle is disrupted by excessive synthetic fertiliser use, which causes algal blooms and dead zones in water bodies.

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bioinformatics

Bioinformatics is the interdisciplinary field that applies computer science, statistics and mathematics to store, analyse and interpret biological data, especially DNA, RNA and protein sequences. It makes modern genomics possible by assembling raw sequencing reads into genomes, predicting gene function, modelling protein structures and comparing evolutionary relationships across species. It is indispensable in drug discovery, precision medicine, crop improvement and pandemic surveillance.

Example: Tracking SARS-CoV-2 variants during the pandemic relied on bioinformatics pipelines that assembled and compared thousands of viral genomes.

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biological and public health emergency

A biological and public health emergency is the NDMA's category for disasters arising from disease outbreaks, epidemics and bioterrorism that threaten population health on a large scale.

Example: NDMA's 2008 guidelines on biological emergencies prescribe surveillance, quarantine and medical stockpiles

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Biological and Toxin Weapons Convention

The Biological and Toxin Weapons Convention (1972) is the international treaty banning biological and toxin weapons. India is a signatory.

Example: the convention prohibits developing or stockpiling biological WMDs

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Biological Diversity (Amendment) Act, 2023

The Biological Diversity (Amendment) Act, 2023, passed by Parliament in August 2023 and in force from April 2024, significantly reformed India's biodiversity regime. Its key changes include decriminalising offences (replacing imprisonment with monetary penalties), exempting registered AYUSH practitioners and codified traditional knowledge from benefit-sharing obligations, and easing intellectual property approvals for inventions based on biological resources. The amendments aim to simplify compliance and promote research and traditional medicine, though they have drawn criticism for potentially weakening community rights and enforcement.

Example: Under the 2023 amendments, a vaidya practising Ayurveda for livelihood is exempted from sharing benefits for accessing biological resources.

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Biological Diversity Act

The Biological Diversity Act is India's principal legislation for the conservation of biological resources and the fair and equitable sharing of benefits arising from their use. Enacted in 2002 to implement the Convention on Biological Diversity, it created a three-tier institutional structure: the National Biodiversity Authority, State Biodiversity Boards and local Biodiversity Management Committees. It regulates access to India's biological resources by foreigners and commercial users, and was substantially amended in 2023.

Example: A foreign company seeking to use Indian medicinal plants for drug research must obtain prior approval from the National Biodiversity Authority under this Act.

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Biological Diversity Act, 2002

The Biological Diversity Act, 2002 is the Indian law enacted to give effect to the Convention on Biological Diversity (1992), to which India is a party. It provides for the conservation of biological diversity, sustainable use of its components, and fair and equitable sharing of benefits from the use of biological resources and associated traditional knowledge. The Act established the National Biodiversity Authority at the national level, State Biodiversity Boards in the states, and Biodiversity Management Committees at the local level.

Example: The Act requires Indian commercial users of biological resources to give prior intimation to the State Biodiversity Board, while foreign entities need National Biodiversity Authority approval.

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biological emergency

A biological emergency is a disaster-scale health crisis caused by disease outbreaks, epidemics or bioterrorism that overwhelms health systems.

Example: the COVID-19 pandemic was a biological emergency of global scale

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biomagnify

Biomagnification is the process by which the concentration of a persistent pollutant increases at each successive level of a food chain. Non-biodegradable toxins like heavy metals and organochlorine pesticides are absorbed by primary producers and then concentrated in the fatty tissues of herbivores and, most severely, top predators that eat many contaminated prey. The classic consequence is eggshell thinning in birds of prey caused by accumulated DDT.

Example: Mercury released into water biomagnifies up the aquatic food chain, reaching dangerous levels in large predatory fish like tuna and shark.

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biome

A biome is a large-scale ecological community defined by its characteristic climate, vegetation and animal life, spanning continents. Major terrestrial biomes include tropical rainforest, savanna, desert, temperate grassland, temperate deciduous forest, boreal forest (taiga) and tundra, each shaped primarily by temperature and precipitation patterns. Biomes provide the broad framework for understanding global biodiversity distribution and for modelling how climate change will shift ecosystems.

Example: The tropical rainforest biome of the Amazon and the Congo basin holds the highest species richness of any terrestrial biome.

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biomedical waste

Biomedical waste is waste generated during the diagnosis, treatment or immunisation of humans or animals, including infectious waste, sharps, expired pharmaceuticals, chemical waste and radioactive material. Because it can spread infection and injury, India's Biomedical Waste Management Rules, 2016 mandate segregation at source into colour-coded bags (yellow for infectious, red for contaminated recyclable, white for sharps, blue for glassware) and treatment through authorised common biomedical waste facilities. Hospitals must obtain authorisation from the State Pollution Control Board and follow barcoding and reporting requirements.

Example: Used syringes, blood-soaked dressings and expired vaccines from hospitals are collected as biomedical waste for incineration or autoclaving.

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biomining

Biomining is the scientific excavation, processing and remediation of legacy municipal waste dumped in old landfills over decades. The waste is dug up, screened and separated into recyclables, refuse-derived fuel and stabilised soil-like material that can be used for landscaping or road sub-base, while the reclaimed land can be put to productive use. India's Solid Waste Management Rules, 2016 require legacy dumpsites to be mapped and remediated through biomining or bioremediation within a fixed timeframe.

Example: Cities have reclaimed land from the Ghazipur dumpsite in Delhi and similar legacy landfills through large-scale biomining operations.

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Biopiracy

Biopiracy is the unauthorized commercial exploitation of a country's biological resources or the traditional knowledge of its indigenous and local communities, typically by foreign corporations patenting products derived from them without sharing benefits. It raises issues of intellectual property rights, benefit-sharing and biodiversity conservation under the Convention on Biological Diversity and India's Biological Diversity Act, 2002. For UPSC, it links environment, science and technology, and IPR in both prelims and mains.

Example: the patent on turmeric's wound-healing properties, revoked by the US Patent Office in 1997 after India's challenge

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bioreactor

A bioreactor is a vessel that provides the controlled environment cells need to grow outside the body: nutrients, oxygen, temperature, and sometimes mechanical cues like stretching or fluid flow. In 3D bioprinting, the printed construct matures in a bioreactor while its cells multiply, fuse and begin behaving like real tissue.

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Biorock

Biorock, also called mineral accretion technology, is a method of restoring damaged coral reefs by passing a low-voltage electric current through submerged steel structures. The current triggers the deposition of limestone minerals on the structure, creating an ideal surface for coral larvae to settle, and corals grown this way survive and grow several times faster than on natural substrates. It is used in reef restoration projects in several countries and is frequently cited as an example of active coral reef rehabilitation.

Example: Biorock structures in Indonesian waters have been used to regrow coral reefs damaged by blast fishing and bleaching.

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Biorock technology

Biorock, or mineral accretion technology, is a coral reef restoration method in which a small amount of electrical current is passed through steel structures placed on the sea bed, causing dissolved minerals in seawater to crystallise as limestone (calcium carbonate) on the structure. Coral larvae and broken coral fragments fixed to the structure grow four to six times faster than normal because they do not expend energy building their own calcium carbonate skeletons.

Example: In January 2020 the Zoological Survey of India, with Gujarat's forest department, installed India's first solar-powered biorock structure off the Mithapur coast in the Gulf of Kachchh for coral restoration.

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Biosecurity

Biosecurity is the set of measures to prevent the accidental or deliberate release of dangerous pathogens from laboratories and facilities.

Example: high-containment BSL-3 and BSL-4 labs operate under strict biosecurity protocols

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biosphere

The biosphere is the thin, life-supporting zone of the Earth where living organisms exist, spanning parts of the atmosphere, hydrosphere and lithosphere. It encompasses every ecosystem on the planet, from deep-sea vents to high mountain forests, and its health underpins all other environmental processes.

Example: India's Nilgiri Biosphere Reserve is designated under UNESCO's Man and the Biosphere Programme, which protects representative biosphere regions worldwide.

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biotechnology

Biotechnology is the use of living organisms, cells or biological processes to develop products and technologies for medicine, agriculture, industry and the environment. It ranges from traditional fermentation to modern genetic engineering, gene editing and biopharmaceutical production.

Example: Bt cotton, a genetically engineered insect-resistant variety widely grown in India, is a leading agricultural product of biotechnology.

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Biotechnology for Economy, Environment and Employment

Approved by the Union Cabinet on 24 August 2024 and formulated by the Department of Biotechnology, BioE3 is India's policy for fostering high-performance biomanufacturing. It converges biotechnology with engineering and digital tools across five priority domains: carbon capture and utilisation, precision biotherapeutics, smart proteins, enzymes and climate-resilient agriculture. A MoolankurBioEnabler Network of Bio-AI hubs, biofoundries and biomanufacturing centres supports the mission of green growth, employment generation and bioeconomic expansion.

Example: The first DBT-BIRAC joint call under BioE3 drew over 2,000 proposals, with about 40 percent led by startups and industry.

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Biotechnology Industry Research Assistance Council (BIRAC)

The Biotechnology Industry Research Assistance Council (BIRAC) is a public sector company under the Department of Biotechnology, established in 2012 to support biotechnology innovation and entrepreneurship in India. It funds startups, small companies and academic researchers through grants, incubation support and equity-free schemes, bridging the gap between research and commercialisation. It plays a central role in implementing programmes under the BioE3 policy and the Bio-RIDE scheme.

Example: BIRAC's Biotechnology Ignition Grant (BIG) scheme provides early-stage funding to biotech startups developing new products.

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bioterrorism

Bioterrorism is the deliberate release of disease-causing organisms or toxins to cause death, panic and economic damage. It is a recognised national security and disaster-management concern.

Example: the 2001 anthrax letter attacks in the US are the classic bioterrorism case

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biotic components

Biotic components are the living parts of an ecosystem: the plants, animals, fungi and microorganisms that interact through feeding relationships and energy flow. They are typically grouped as producers (autotrophs), consumers (heterotrophs) and decomposers.

Example: In a pond ecosystem, algae and aquatic plants (producers), fish (consumers) and bacteria (decomposers) together form the biotic components.

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Bipin Chandra Pal

Bipin Chandra Pal is the Bengal nationalist who, with Lala Lajpat Rai and Bal Gangadhar Tilak, formed the Lal-Bal-Pal trio of extremist leaders in early 20th-century India. A journalist and orator, he edited the newspaper Bande Mataram, championed Swadeshi and boycott, and demanded complete independence rather than constitutional concessions. For UPSC, he is a central figure of the extremist phase of the freedom struggle and the 1905 Swadeshi movement.

Example: his editorship of Bande Mataram and leadership of the Swadeshi movement after the Partition of Bengal in 1905

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Birla Committee

The Birla Committee is the SEBI committee on corporate governance constituted on 7 May 1999 under the chairmanship of Kumar Mangalam Birla. It produced India's first formal code of corporate governance, dividing its recommendations into mandatory and non-mandatory categories covering board composition, audit committees and disclosure. Its report led to Clause 49 of the stock exchange listing agreement in 2000. For UPSC, it is the foundation stone of corporate governance in the Indian economy syllabus.

Example: the introduction of Clause 49 of the listing agreement in 2000 based on its recommendations

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Birsa Munda

Birsa Munda (1875 to 1900) is the Munda tribal leader who led the Ulgulan (Great Tumult) of 1899 to 1900 in the Chotanagpur region against British land policies, missionary activity and the diku (outsider) moneylenders. He founded the Birsait faith, blending tribal beliefs with a moral code, and died in Ranchi jail in 1900. For UPSC, he is the archetypal tribal revolt leader of the freedom struggle.

Example: His birth anniversary, 15 November, is observed as Janjatiya Gaurav Divas, honouring the contribution of tribal communities.

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birsa-101

BIRSA-101 is India's first indigenous CRISPR-based gene therapy for sickle cell disease, unveiled in November 2025 at CSIR-IGIB Delhi on the home-grown enFnCas9 platform, with technology transferred to the Serum Institute of India for affordable scale-up.

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births and deaths

Births and deaths are the basic vital events of demography, recorded through the Civil Registration System under the Registration of Births and Deaths Act, 1969, and supplemented by the Sample Registration System and Census. Birth and death rates, along with infant and maternal mortality, define a country's demographic transition stage. For UPSC GS-1, vital statistics are the foundation of population geography and health-policy questions.

Example: The Sample Registration System (SRS) bulletins of the Registrar General of India

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BiSAG-N is

BiSAG-N is the Bhaskaracharya National Institute for Space Applications and Geo-informatics, headquartered at Gandhinagar in Gujarat under the Ministry of Electronics and Information Technology. Born as the Gujarat state agency BISAG in 2003 and elevated to a national institute by the Union Cabinet in 2020, it supplies satellite-based geo-spatial solutions for governance. It matters for UPSC for questions on the use of GIS and remote sensing in planning, disaster management and Digital India programmes.

Example: It developed the GIS-based automatic water-supply system for cantonment boards launched in December 2021.

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Bishnoi

The Bishnoi are a Vaishnavite community founded by Guru Jambheshwar in 15th-century Rajasthan, organized around 29 (bish-noi) principles that prohibit felling green trees, killing animals and wasting natural resources. Their deep conservation ethic has made them a symbol of environmental protection in India. For UPSC, they appear in environment and ethics questions as an early example of community-led conservation.

Example: Amrita Devi Bishnoi and 363 followers giving their lives at Khejarli in 1730 to protect Khejri trees

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Bishnupur

Bishnupur is a town in West Bengal that served as the capital of the Malla kings from the 7th to the 19th century. It is famous for its distinctive terracotta temples such as the Rasmancha and the Shyam Rai temple, and for the Bishnupur gharana of Hindustani classical music and Baluchari silk weaving. For UPSC, it is an important art-and-culture site representing Bengal's temple architecture tradition.

Example: the Rasmancha temple built by the Malla king Bir Hambir around 1600

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Bituminous

Bituminous is a grade of coal between lignite and anthracite, commonly called soft coal, with a carbon content of about 45 to 86 percent. It burns with a smoky flame, is widely used in thermal power generation, and when heated in the absence of air yields metallurgical coke for the steel industry. Most of India's Gondwana coal is bituminous or sub-bituminous. For UPSC, coal grades are standard prelims geography and energy questions.

Example: the bituminous coal of the Gondwana coalfields of Jharkhand and West Bengal

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Black (petroleum products)

Black is the colour-revolution label for petroleum products, included in extended versions of the colour-revolution list. The Black Revolution refers to self-sufficiency drives in petroleum and biofuel production, including ethanol blending. For UPSC it is the energy entry in the agricultural colour series.

Example: Ethanol blending targets that turn sugarcane into fuel link the Black Revolution to farm incomes.

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Black (regur)

Regur, popularly called black soil or black cotton soil, is the black, clay-rich soil formed from the weathering of Deccan basalt lava. It is highly moisture-retentive, rich in iron, lime and magnesium, and swells and cracks with wetting and drying, making it ideal for cotton cultivation. It covers large parts of Maharashtra, Madhya Pradesh, Gujarat and Andhra Pradesh. For UPSC, it is a core topic of Indian physical geography and agriculture.

Example: the black cotton soils of the Deccan Trap region in Maharashtra

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Black Americans or Native Americans

In UPSC GS-1 world history and polity answer writing, the phrase distinguishes two different groups in the United States. Black Americans are the descendants of enslaved Africans whose struggle produced the abolition of slavery and the civil rights movement. Native Americans are the indigenous peoples of the Americas, whose communities were displaced by settler colonialism and confined to reservations. Keeping the two histories distinct matters for accurate answers on civil rights, discrimination and post-colonial societies.

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black box problem

The black box problem is the difficulty of interpreting why a complex artificial intelligence model produces a particular output. Deep neural networks may be highly accurate while their internal decision logic remains opaque, which raises concerns about accountability, bias and safety in high-stakes uses.

Example: A deep learning model recommending a medical diagnosis without explaining its reasoning illustrates the black box problem.

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black gold

Black gold is the popular nickname for coal, India's most abundant fossil fuel and the backbone of its thermal power sector, so called because of the wealth it generates for coal-bearing regions. India is among the world's largest coal producers and consumers. For UPSC, coal's geography, grades, and the transition debate under energy security and climate commitments are recurring GS-1 and GS-3 themes.

Example: The Jharia coalfields of Jharkhand, among India's richest coal reserves

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black hole

A black hole is a region of spacetime where gravity is so intense that nothing, not even light, can escape beyond its boundary, called the event horizon. It forms when a massive star collapses under its own gravity at the end of its life.

Example: The supermassive black hole Sagittarius A* at the centre of the Milky Way was imaged by the Event Horizon Telescope collaboration in 2022.

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Black Hole of Calcutta

The Black Hole of Calcutta is the alleged incident of 20 June 1756, when troops of Siraj ud-Daulah confined British prisoners in a tiny dungeon at Fort William overnight. John Zephaniah Holwell claimed 123 of 146 prisoners died of suffocation, though later historians regard the numbers as exaggerated. The British used the episode as propaganda to justify war against the Nawab. For UPSC, it belongs to the prelude of the Battle of Plassey in modern Indian history.

Example: John Zephaniah Holwell's account of the confinement at Fort William on 20 June 1756

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black holes

Black holes are regions of spacetime where gravity is so intense that nothing, not even light, can escape beyond the event horizon. They range from stellar-mass black holes formed by collapsing stars to supermassive black holes weighing millions of solar masses found at galactic centres.

Example: Cygnus X-1, one of the first confirmed stellar-mass black holes, was discovered through X-ray emissions from its accretion disk.

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Black Money (Undisclosed Foreign Income and Assets) Act, 2015

The Economic Intelligence Council is the apex body for coordination among economic intelligence and enforcement agencies, chaired by the Finance Minister with heads of the ED, DRI, FIU-IND and others as members. It matters as the forum where economic-offence strategy is set.

Example: EIC coordination of the anti-black-money drive

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BLEVE

BLEVE, or boiling liquid expanding vapour explosion, is the violent explosion of a pressurised liquid container heated by fire, hurling fireballs and fragments. It is a feared scenario in LPG and chemical storage.

Example: fire engulfing an LPG bullet tanker can trigger a BLEVE

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blind spot

In environmental economics, the blind spot refers to GDP's failure to account for the depletion of natural capital. GDP counts the timber sold but ignores the forest destroyed to produce it, so an economy can look healthy while its ecological base is being silently eroded. Growth that consumes nature without recording the loss is therefore ecologically bankrupt even when the headline numbers rise.

Example: Green GDP and the UN System of Environmental-Economic Accounting (SEEA), which try to subtract natural-resource depletion and pollution costs from conventional national accounts.

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blind valleys

Blind valleys are karst landform features where a valley is closed at its lower end, so the surface stream sinks underground through a sinkhole instead of flowing out. They form in limestone terrain where solution weathering dominates. For UPSC physical geography, blind valleys belong with other karst features like dolines, uvalas, poljes, and stalactites, frequently tested through match-the-pair questions.

Example: The classical Karst region of the Dinaric Alps in Slovenia

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Blitzkrieg

Blitzkrieg, meaning lightning war, is the German military doctrine of the Second World War based on rapid, concentrated combined-arms attacks using tanks, motorized infantry and close air support to penetrate, encircle and collapse the enemy. It delivered swift victories in Poland in 1939 and France in 1940. For UPSC, it is a standard concept in world-history questions on the causes and conduct of the Second World War.

Example: the German invasion of Poland in September 1939

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block system of irrigation

The block system of irrigation was a scheme devised by M. Visvesvaraya in 1899 that rationalised water distribution in the Deccan canals by dividing the command area into blocks. It ensured a more equitable and orderly allocation of irrigation water to cultivators.

Example: Visvesvaraya introduced the block system in the Deccan canals of Maharashtra before his 1903 automatic floodgate work at Khadakwasla near Pune.

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Blockchain

A distributed digital ledger in which transactions are grouped into blocks that are cryptographically chained to the previous block, so altering any record requires rewriting every block after it. Identical copies of the ledger are held across a network of participants, which removes the need for a central authority to verify transactions. In governance it can make land records, supply chains and certificates tamper-evident and independently auditable.

Example: Andhra Pradesh piloted blockchain-based land records to make property titles tamper-proof and verifiable.

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blockchain is

Blockchain is a distributed digital ledger in which transactions are grouped into blocks that are cryptographically linked in chronological order across a decentralised network of computers, making records tamper-resistant without a central authority. It underlies cryptocurrencies and is explored for land records, supply chains, and digital identity. For UPSC GS-3, blockchain questions focus on its uses, limits, and India's crypto regulation stance.

Example: Bitcoin, launched in 2009, the first blockchain application

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blockchain pilots

Blockchain pilots are the experimental uses of distributed-ledger technology to make land records tamper-evident and transaction histories immutable. Tested by some states for registry integrity, they promise fraud-proof titling. For UPSC they are the emerging-tech frontier of land administration.

Example: A pilot recording every mutation on a blockchain ledger, visible to all stakeholders, shows the technology's promise.

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Blockchain-as-a-Service (BaaS)

Blockchain-as-a-Service is cloud-style delivery of blockchain infrastructure, letting organisations use distributed ledgers without running their own networks. India's Vishvasya stack offers BaaS through geographically distributed infrastructure.

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blood and iron

Blood and iron is the policy associated with Otto von Bismarck's 1862 'Blut und Eisen' speech, asserting that the great questions of the day would be settled by military force and industrial power, not speeches and votes. It became the doctrine behind the Prussian-led unification of Germany through the Danish, Austro-Prussian, and Franco-Prussian wars. For UPSC world history, it is the defining phrase of realpolitik and German unification.

Example: Bismarck's 1862 speech to the Prussian Landtag

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Blood and iron

Blood and iron is Bismarck's 1862 declaration that Germany's great questions would be settled not by speeches and votes but by war and industry. It names the Prussian method of unification: military power wielded by statecraft.

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Blood and Iron" policy

The Blood and Iron policy is Otto von Bismarck's doctrine, proclaimed in 1862, that the unification of Germany would be achieved not by speeches and parliamentary resolutions but by war and industrial-military power. As Prussian chancellor he pursued it through wars against Denmark in 1864, Austria in 1866 and France in 1870-71, culminating in the German Empire of 1871. For UPSC, it is central to world-history questions on German unification and 19th-century European nationalism.

Example: the Franco-Prussian War of 1870-71, which completed German unification

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Blood pH

human blood is held between 7.35 and 7.45, slightly alkaline, chiefly by the bicarbonate buffer system.

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Bloody Sunday

Bloody Sunday of January 1905 is the massacre of peaceful petitioners by troops outside the Winter Palace in St Petersburg. It shattered faith in the Tsar, ignited the 1905 Revolution and rehearsed the grievances that exploded in 1917.

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Bloody Sunday, January 1905

Bloody Sunday is the event of 9 January 1905, when Tsarist troops fired on a peaceful procession of workers led by Father Georgy Gapon marching to the Winter Palace in St. Petersburg to petition the Tsar. The killings shattered faith in the Tsar and triggered the Revolution of 1905, forcing the October Manifesto and the creation of the Duma. For UPSC, it is a landmark of world history as the prologue to the Russian Revolution of 1917.

Example: Father Gapon's march to the Winter Palace in St. Petersburg on 9 January 1905

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Blue biotechnology

The branch of biotechnology that uses marine and aquatic organisms, from algae and sponges to deep-sea microbes, as sources of new products and processes. It covers marine-derived drugs, enzymes, biomaterials, cosmetics and biofuels, and is prized because the oceans hold vast unexplored genetic diversity. It is distinct from red (medical), white (industrial), green (agricultural) and grey (environmental) biotechnology.

Example: The painkiller ziconotide was developed from the venom of a marine cone snail, a classic blue-biotechnology product.

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Blue Box

The Blue Box is the WTO category for subsidies linked to production-limiting programmes, exempt from reduction commitments. Few countries use it now, but it shelters payments that restrain output. For UPSC it is the middle box between distorting Amber and benign Green support.

Example: EU payments tied to set-aside acreage were the classic Blue Box example in WTO negotiations.

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blue carbon

Blue carbon is the carbon captured and stored by coastal and marine ecosystems, principally mangroves, seagrasses and tidal marshes. The IPCC defines it as biologically driven carbon fluxes and storage in marine systems amenable to management; these ecosystems sequester carbon more efficiently per unit area than most terrestrial forests.

Example: The mangroves of the Sundarbans store vast quantities of blue carbon in their waterlogged sediments.

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Blue carbon

Blue carbon is the carbon captured and stored by coastal and marine ecosystems, principally mangroves, seagrasses and salt marshes, which sequester carbon at high rates per unit area. It is emerging as a finance stream rewarding coastal conservation.

Example: Protecting a mangrove forest preserves both a storm bio-shield and a blue-carbon stock.

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blue carbon finance

Blue carbon finance refers to funding mechanisms that channel money into the conservation and restoration of blue carbon ecosystems, such as mangroves, seagrasses and salt marshes. It includes carbon credits sold from verified blue carbon projects, payments for ecosystem services and dedicated conservation funds.

Example: Verified blue carbon credit projects from mangrove restoration allow companies to offset emissions while funding coastal conservation.

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Blue economy

The blue economy is the sustainable use of ocean resources for economic growth, improved livelihoods and jobs while preserving the health of ocean ecosystems, the definition given by the World Bank in its 2017 report The Potential of the Blue Economy. It covers established sectors like fisheries and shipping, emerging ones like offshore wind and marine biotechnology, and enablers like ocean observation.

Example: India's draft National Policy on Blue Economy seeks to align fisheries, ports, energy and security policies against this single sustainability standard.

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Blue Economy

The Blue Economy is the sustainable use of ocean resources for economic growth, covering fisheries, aquaculture, marine biotechnology, shipping and coastal tourism. India's Deep Ocean Mission and PMMSY are its pillars, and the concept guides marine spatial planning. For UPSC it is the ocean-development paradigm.

Example: Deep-sea fishing and marine aquaculture promoted under PMMSY are Blue Economy building blocks.

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Blue Flag beach certification

A globally recognised eco-label awarded by the Denmark-based Foundation for Environmental Education (FEE) to beaches, marinas and sustainable boating tourism operators. It is granted only when a site meets 33 stringent criteria grouped under four heads: environmental education and information, bathing water quality, environmental management and conservation, and safety and services. India earned its first eight Blue Flags in 2020 and reached 12 certified beaches by 2022.

Example: Shivrajpur in Gujarat, Ghoghla in Diu and Radhanagar in the Andaman and Nicobar Islands are among India's Blue Flag beaches.

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Blue hydrogen

Hydrogen produced from natural gas through steam methane reforming, with the resulting carbon dioxide captured and stored underground instead of being released. Because its emissions are substantially lower than conventional grey hydrogen, it is treated as a transitional fuel on the road to fully green hydrogen. Critics note that some emissions and methane leakage remain, so it is cleaner than grey hydrogen but not zero-carbon.

Example: Several Gulf and European projects pair natural-gas reforming with carbon capture to market blue hydrogen for refineries and fertiliser plants.

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Blue Origin

An American private spaceflight company founded in 2000 by Jeff Bezos. It builds reusable rockets, beginning with the suborbital New Shepard vehicle used for space tourism and research flights, and the heavy-lift New Glenn rocket, which made its first flight in January 2025. It is also developing the Blue Moon lunar lander for NASA's Artemis programme, making it a leading private competitor in commercial spaceflight.

Example: Blue Origin's New Shepard has carried paying tourists on suborbital hops past the Karman line.

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Blue Revolution

The Blue Revolution is India's programme for the rapid development of the fisheries and aquaculture sector, launched as an umbrella scheme in 2015-16 to triple fish production and double fishers' incomes. It promoted inland aquaculture, marine fisheries and fish processing, and was later subsumed into the Pradhan Mantri Matsya Sampada Yojana of 2020. For UPSC, it is important in the agriculture and allied-sector economy syllabus.

Example: the Pradhan Mantri Matsya Sampada Yojana launched in 2020

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Blue Water Policy

The Blue Water Policy is the early Portuguese strategy in the Indian Ocean under Viceroy Francisco de Almeida from 1505 to 1509. It held that Portugal should dominate Asian trade through naval supremacy on the high seas rather than by acquiring inland territory, exemplified by the defeat of the combined Egyptian-Gujarati fleet at Diu in 1509. His successor Albuquerque reversed it in favour of territorial conquest. For UPSC, it marks the beginning of European presence in India.

Example: the Portuguese victory at the Battle of Diu in 1509

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Blue-glazed tilework

Blue-glazed tilework is the Persianate technique of decorating buildings with glazed ceramic tiles in deep blue and turquoise, used on domes, minarets and facades of Indo-Islamic architecture in India. The glaze, coloured by cobalt and copper, protects the surface while creating a striking visual effect. It reflects the Central Asian and Persian influence on Sultanate and Mughal building traditions. For UPSC, it is a recognizable feature in art-and-culture questions on Islamic architecture.

Example: the glazed tile decoration of the Chini-ka-Rauza in Agra

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blue-green resilience

Blue-green resilience is the strategy of combining water systems (blue: rivers, lakes, wetlands) with green spaces (parks, forests, mangroves) to absorb shocks like floods and heat. It is the ecological backbone of sponge cities.

Example: restoring urban lakes connected by green corridors builds blue-green resilience

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blueprint for Akbar's

Blueprint for Akbar's administration is how historians describe Sher Shah Suri's reforms, which Akbar later adopted and systematised. Sher Shah's innovations included the zabti revenue assessment, the rupiya silver coin, trunk roads with sarais, and an efficient bureaucracy. For UPSC, the Suri interlude shows that Mughal administration rested on Afghan-era foundations, making Sher Shah a favourite prelims figure.

Example: Sher Shah Suri, ruler of the Sur Empire, 1540-1545

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BNP

BNP is the Bangladesh Nationalist Party, founded on 1 September 1978 by President Ziaur Rahman on the ideology of Bangladeshi nationalism. After his assassination in 1981 it was led by his widow Khaleda Zia, and it remains the principal rival of the Awami League, forming governments in 1991, 1996, and 2001. For UPSC, it is indispensable to understanding Bangladesh's two-party rivalry and India's neighbourhood policy.

Example: Khaleda Zia became Bangladesh's first woman prime minister when the BNP won the 1991 general election.

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boar (Varaha)

Varaha, the boar avatar, is Vishnu's third incarnation in Hindu tradition, in which he dives into the cosmic ocean to rescue the earth goddess Bhudevi from the demon Hiranyaksha. The image became a royal emblem of divine kingship under the Guptas and Chalukyas. For UPSC art and culture, it is the classic example of Gupta-period religious sculpture and avatar iconography.

Example: The colossal Varaha panel at the Udayagiri caves in Madhya Pradesh, where the boar lifts Bhudevi in Gupta-period sculpture.

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Board of Administration

The Board of Administration is the three-member body, comprising Henry Lawrence, John Lawrence and Charles Mansell, that governed Punjab after its annexation by the British in 1849. Ruling until 1853, it combined executive and judicial authority, carrying out land settlements, building canals and roads, and demilitarizing the Sikh sardars. For UPSC, it is a key institution in the history of British expansion and colonial administration in northern India.

Example: the administration of Punjab under the Board from its annexation in 1849 to 1853

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Board of Control

The Board of Control is the supervisory body created by Pitt's India Act of 1784 to oversee the East India Company's political and military affairs. Composed of six commissioners, including the Secretary of State, it created a dual system of control, with the Company handling commerce and the Board directing policy, which lasted until the Crown assumed direct rule in 1858. For UPSC, it marks the beginning of direct British parliamentary control over India.

Example: The dual control ran through the Charter Acts of 1793 to 1853, ending only with the Government of India Act, 1858, after the Revolt of 1857.

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Bodh Gaya

Bodh Gaya is the town in Gaya district, Bihar, where Siddhartha Gautama attained enlightenment under the Bodhi tree and became the Buddha. The Mahabodhi Temple complex, first built by Ashoka in the 3rd century BCE with the present brick structure from the Gupta period, is a UNESCO World Heritage Site (2002). For UPSC, it is one of the four great Buddhist pilgrimage sites, alongside Lumbini, Sarnath and Kushinagar.

Example: The Vajrasana, the diamond throne installed by Ashoka, marks the exact spot of the Buddha's meditation beside the temple.

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Bodhi tree

The Bodhi tree is the sacred fig (Ficus religiosa, peepal) under which Siddhartha Gautama attained enlightenment at Bodh Gaya, making it the most revered living symbol of Buddhism. Pilgrims venerate the tree growing beside the Mahabodhi Temple, believed to be a direct descendant of the original. For UPSC, it is inseparable from the Buddha's enlightenment and the geography of Buddhist pilgrimage.

Example: The Sri Maha Bodhi at Anuradhapura in Sri Lanka grew from a cutting carried there by Sanghamitta, Emperor Ashoka's daughter, in the 3rd century BCE.

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Bodhisattva

A Bodhisattva is, in Mahayana Buddhism, a being who has attained enlightenment but deliberately delays final nirvana out of compassion, vowing to help all sentient beings achieve liberation. The ideal embodies wisdom united with karuna or compassion, and major bodhisattvas such as Avalokiteshvara, Manjushri and Maitreya became objects of widespread devotion. For UPSC, the concept is essential to questions on Buddhist philosophy and Buddhist art.

Example: Avalokiteshvara, the bodhisattva of compassion

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bodhisattva images

Bodhisattva images are Buddhist sculptures depicting enlightened beings who postpone nirvana to help others attain it, such as Avalokiteshvara and Maitreya. They flourished in Gandhara and Mathura art from the 1st to 5th centuries CE, blending Indian and Hellenistic styles. For UPSC art-and-culture, bodhisattva figures illustrate Mahayana Buddhism's shift toward devotional worship and its artistic expression.

Example: Gandhara-school bodhisattva sculptures, 1st to 5th century CE

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Bodhisattva Padmapani

The Bodhisattva Padmapani is the celebrated 5th-century CE mural in Cave 1 at Ajanta, Maharashtra, depicting the bodhisattva Avalokiteshvara holding a lotus or padma. Painted under Vakataka patronage, it is a masterpiece of Indian art, famous for its serene expression, three-quarter profile and refined modelling. The image embodies the Mahayana ideal of compassionate divinity. For UPSC, it is one of the most frequently asked paintings of ancient Indian art.

Example: the mural in Cave 1 at Ajanta, Maharashtra

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Bodhisattvas

In UPSC art-and-culture and ancient-history contexts, Bodhisattvas are the compassionate enlightened beings of Mahayana Buddhism who postpone nirvana to liberate others. The principal figures are Avalokiteshvara, Manjushri, Maitreya and Tara, each with distinct attributes and iconography. They appear prominently in the murals of Ajanta and the rock-cut sculptures of Ellora, as well as in Gandhara and Mathura art. Recognizing their iconography helps answer questions on Buddhist art and philosophy.

Example: the rock-cut bodhisattva sculptures at Ellora and the murals of Ajanta

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bodily autonomy

Bodily autonomy is the right of every person to make decisions about their own body without coercion, covering choices on reproduction, medical treatment, and physical integrity. Indian courts have read it into Article 21’s guarantee of personal liberty, notably in Suchita Srivastava v. Chandigarh Administration (2009) on reproductive choice and in the Puttaswamy privacy judgment (2017). For UPSC it connects fundamental rights, gender justice, and medical ethics.

Example: In Suchita Srivastava (2009) the Court upheld a woman’s right to continue her pregnancy as part of personal liberty.

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Bodo Peace Accord

The Bodo Peace Accord is the tripartite Memorandum of Settlement signed on 27 January 2020 with four NDFB factions, the ABSU and the UBPO. It created the Bodoland Territorial Region with expanded powers and a development package, after which NDFB factions disbanded. It matters as the settlement that ended Assam's Bodo insurgency.

Example: The 2020 accord creating the Bodoland Territorial Region

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Boer War of 1899-1902

The Boer War of 1899-1902, also called the Second Boer War, was fought between the British Empire and the two Boer republics of South Africa, the Transvaal and the Orange Free State. It began over control of gold-rich territory and ended with the Treaty of Vereeniging in May 1902. For UPSC, it matters because Gandhi organised the Natal Indian Ambulance Corps during the war, an early instance of his public service strategy under colonial rule.

Example: The Treaty of Vereeniging signed in May 1902 ended the war and absorbed the Boer republics into the British Empire.

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Bofors scandal

The Bofors scandal is the corruption controversy over India's 1986 purchase of 410 155mm howitzer guns from the Swedish firm AB Bofors for Rs 1,437 crore. Swedish Radio's 1987 revelation of alleged Rs 64 crore in kickbacks to Indian politicians and officials, reported in India by The Hindu, gravely damaged the Rajiv Gandhi government. For UPSC, it is the landmark case study of defence-procurement corruption and media-led accountability.

Example: The scandal contributed to the Congress defeat in the 1989 general election, though a Delhi court allowed the CBI to close the case in 2011 after decades of investigation.

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Boghazkoy inscription

The Boghazkoy inscription is the c. 1400 BCE treaty text from Boghazkoy (ancient Hattusa in Turkey) recording a pact between the Hittite and Mitanni kings. It invokes the Vedic deities Indra, Mitra, Varuna and the Nasatyas as divine witnesses, providing the earliest epigraphic evidence of Indo-Aryan presence in West Asia and a chronological anchor for Vedic studies. For UPSC, it is a high-value GS-1 ancient history fact on the Indo-Aryans outside India.

Example: The Mitanni-Hittite treaty of c. 1400 BCE

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Boiling Water Reactor (BWR)

A type of light-water nuclear reactor in which water is boiled directly inside the reactor core, and the steam produced drives the turbine to generate electricity. Because coolant and steam share a single loop, the design is simpler and cheaper than a pressurised water reactor, though the turbine can become mildly radioactive. India's Tarapur Units 1 and 2, commissioned in 1969, are boiling water reactors built with American collaboration.

Example: TAPS-1 and TAPS-2 at Tarapur in Maharashtra are India's operating boiling water reactors.

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Bokaro

Bokaro is an industrial city in Jharkhand built around the Bokaro Steel Plant, a public-sector integrated steel unit managed by SAIL and established with Soviet collaboration. The plant sits in the Damodar valley, close to coking coal and iron ore sources. For UPSC, Bokaro is the textbook case of post-Independence public-sector industrialisation and of locational advantages drawn from raw material and power proximity in the Chota Nagpur plateau.

Example: The Bokaro Steel Plant, a SAIL unit commissioned in the early 1970s with Soviet assistance.

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Bollgard I

Bollgard I is Bt cotton carrying the cry1Ac gene alone; it was India's first approved Bt cotton variety.

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Bollgard II

Bt cotton carrying cry1Ac plus cry2Ab; broader bollworm protection and slower pest-resistance build-up.

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Bolsa Familia

Bolsa Familia is Brazil's flagship conditional cash transfer programme, launched in 2003 under President Lula da Silva. It gives monthly cash to poor families that meet conditions like school attendance and child health check-ups. It was folded into Auxilio Brasil in 2021 and relaunched under its original name in 2023. For UPSC, it is the standard example of conditional cash transfers cited in debates on poverty alleviation, welfare targeting and direct benefit schemes.

Example: Brazil's 2023 relaunch of the programme under President Lula, extending coverage to millions of low-income households.

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Bolshevik Revolution

The Bolshevik Revolution, also called the October Revolution, was the 1917 seizure of power in Russia by the Bolshevik Party under Lenin. It overthrew the Provisional Government, established the world's first socialist state and led to the creation of the Soviet Union. For UPSC, it matters as a turning point in modern world history that inspired socialist ideas in India's freedom movement and reshaped twentieth-century geopolitics.

Example: The storming of the Winter Palace in Petrograd in October 1917 marked the revolution's decisive moment.

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Bombay

Bombay, now Mumbai, was the principal port city and commercial capital of colonial India, and the headquarters of the Bombay Presidency. It hosted early nationalist institutions, the first Indian-owned textile mills and a strong press. In UPSC usage the name usually refers to the city in the colonial and early post-Independence period, before its 1995 renaming, and to the Presidency as an administrative unit of British India.

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Bombay bifurcated

The bifurcation of Bombay refers to the 1960 division of the bilingual State of Bombay into two new states, Maharashtra and Gujarat. The split followed the Samyukta Maharashtra movement, which demanded a Marathi-speaking state with Bombay city as its capital. It was carried out through the Bombay Reorganisation Act, 1960, effective 1 May 1960. For UPSC, it is the key example of linguistic reorganisation of states.

Example: Maharashtra and Gujarat were formed as separate states on 1 May 1960.

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Bombay Millhands Association

The Bombay Millhands Association was India's first labour organisation, founded in 1890 by Narayan Meghaji Lokhande to organise Bombay's textile mill workers. It petitioned for shorter working hours, weekly holidays and compensation for injuries. Though not a trade union in the modern sense, it marks the beginning of organised labour in India. For UPSC, it is the standard starting point of the history of the Indian working-class movement.

Example: Lokhande's founding of the association in 1890 after organising mill workers in Bombay.

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Bombay on 31 October 1920

The founding session of the All India Trade Union Congress (AITUC), India's first central trade union federation, began in Bombay on 31 October 1920 at the Empire Theatre. Lala Lajpat Rai was elected its first president, with leaders such as N.M. Joshi and Dewan Chaman Lal driving the organisation. For UPSC, the date marks the formal beginning of the organised national trade union movement.

Example: The AITUC's first session at the Empire Theatre, Bombay, on 31 October 1920.

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Bombay Plan

The Bombay Plan (1944) was a set of proposals by eight leading industrialists, including J.R.D. Tata and G.D. Birla, for India's economic development: a 15-year programme to double per capita income through state-led industrialisation, with the state financing heavy industry the private sector could not. Though never adopted, it shaped the planning debate and is the standard GS-3 reference for pre-Independence economic thought.

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Bombay textile strike of 1928

The Bombay textile strike of 1928 was a six-month general strike of cotton mill workers, running from April to October 1928, against wage cuts and the millowners' rationalisation scheme. It was led by the communist-led Girni Kamgar Union under S.A. Dange and his colleagues, and ended in partial success for workers. For UPSC, it matters because the government responded with the Meerut Conspiracy Case of 1929, arresting 31 labour leaders.

Example: The general strike that began on 26 April 1928 and the subsequent March 1929 arrests in the Meerut Conspiracy Case.

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Bommai

This is a fragment of the key term Bommai judgment and carries no independent meaning. The substantive concept is S.R. Bommai v. Union of India (1994), the Supreme Court ruling that limited the use of Article 356, made secularism part of the basic structure and prescribed the floor test for proving a legislative majority. Readers should consult the Bommai judgment entry for the full definition and its significance.

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Bommai judgment

The Bommai judgment refers to S.R. Bommai v. Union of India (1994), in which a nine-judge Supreme Court bench settled the law on Article 356. It held that secularism is part of the basic structure, that the President's satisfaction under Article 356 is subject to judicial review, and that the floor of the House, not the Governor's report, is the proper test of a government's majority. It is among the most cited UPSC cases on centre-state relations.

Example: The Court applied Bommai principles during the 2016 political crises in Arunachal Pradesh and Uttarakhand.

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bonds and security deposits

Bonds and security deposits were the censorship tools of the Vernacular Press Act of 1878, under which district magistrates could demand financial bonds from Indian-language newspaper publishers and forfeit them, or seize presses, for anything deemed seditious, with no right of appeal. The English press was exempt. For UPSC, the Act, repealed by Ripon in 1882, is the centrepiece of press-freedom questions.

Example: The Vernacular Press Act, 1878, enacted by Lord Lytton

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Bonn Challenge

A global voluntary effort launched in 2011 to restore degraded and deforested landscapes, anchored by IUCN and Germany. Countries announce their own restoration pledges, contributing to shared global targets for bringing degraded land back into productivity. It feeds into Land Degradation Neutrality and the UN Decade on Ecosystem Restoration (2021 to 2030).

Example: India's Bonn Challenge pledge was to restore 13 million hectares by 2020 and 8 million more by 2030.

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Bonn Challenge pledge

The specific national commitment a country makes under the Bonn Challenge, stating how much degraded land it will restore by a target year. India's pledge began at 13 million hectares by 2020 plus 8 million more by 2030, and was raised to 26 million hectares by 2030 when India hosted UNCCD COP14 in New Delhi in 2019. The figure is a standard UPSC prelims fact.

Example: At UNCCD COP14 in New Delhi (2019), India raised its Bonn Challenge pledge to 26 million hectares of restoration by 2030.

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BOO

BOO is Build-Own-Operate, an infrastructure procurement model in which a private developer builds, owns, and operates a facility indefinitely, with no transfer back to the government. The private party bears construction and operating risk and recovers costs through user charges or power purchase agreements over the asset's life. For UPSC, it belongs to the PPP family in GS-3 and contrasts with BOT and BOOT, where ownership eventually reverts to the state.

Example: The Dabhol power project in Maharashtra was set up by Enron's Dabhol Power Company on a Build-Own-Operate basis with a 20-year power purchase agreement.

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BOOT

BOOT is Build-Own-Operate-Transfer, a public-private partnership model in which the private developer builds, owns, and operates an asset for a fixed concession period and then transfers ownership back to the government. It combines private financing and operational efficiency with eventual public ownership and is widely used for highways, ports, airports, and metro rail. For UPSC, it is a standard GS-3 model, with DBFOT as a common variant.

Example: The Hyderabad Metro Rail, developed on a design-build-finance-operate-transfer concession, reverts to the state government after the concession period.

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BoP disequilibrium is

Balance of Payments disequilibrium is the condition in which a country's total foreign-exchange receipts from the rest of the world do not equal its total payments abroad. A deficit means payments exceed receipts, while a surplus means receipts exceed payments. It can arise from trade imbalances, capital flows, exchange-rate movements or debt servicing, and persistent deficits strain foreign-exchange reserves. For UPSC, it is a core concept of the Indian economy syllabus and questions on external-sector management.

Example: India's 1991 balance of payments crisis, which triggered economic liberalization

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Border Area Development Programme (BADP)

The Border Area Development Programme funds development in villages close to the international border to meet their special needs and instil a sense of security. Running since the 1980s, it covers roads, schools and health centres. It matters as the original development-as-defence scheme.

Example: BADP-funded roads and schools in border blocks

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Border Defence Cooperation Agreement

The Border Defence Cooperation Agreement (BDCA) is a 2013 India-China pact on managing the disputed border along the Line of Actual Control. Signed in Beijing on 23 October 2013, it builds on the 1993 and 1996 agreements by adding flag meetings, hotlines and rules to prevent patrol face-offs from escalating. For UPSC, it is a key confidence-building measure in India-China relations, relevant to questions on border management and the Galwan aftermath.

Example: The agreement signed in Beijing on 23 October 2013 in the presence of Prime Minister Manmohan Singh and Chinese Premier Li Keqiang.

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Border Infrastructure and Management (BIM) Scheme

The Border Infrastructure and Management Scheme is the MHA's umbrella scheme financing border fencing, floodlighting, roads, border outposts and the CIBMS technology stack. It matters as the funding backbone of physical border security.

Example: Fencing and floodlighting projects under the BIM Scheme

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Border management

Border management is the integrated system of guarding borders through forces, fencing, surveillance, intelligence, immigration control and border-area development. India's doctrine rests on 'one border, one force' and smart borders. It matters because every cross-border threat, from terrorism to smuggling, is first a border-management failure.

Example: BSF's layered grid on the India-Pakistan border

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Border Out Posts (BOPs)

Border Out Posts are the forward company-level posts of border-guarding forces along the international border, the basic unit of border domination. Their spacing, infrastructure and surveillance determine border control. It matters because border management is only as strong as its BOP grid.

Example: BSF BOPs along the Punjab border

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Border Roads Organisation

The Border Roads Organisation, raised in 1960, builds and maintains roads in border areas and difficult terrain, including the strategic Darbuk-Shyok-DBO road to Ladakh. It matters because border roads determine how fast forces and supplies reach the frontier.

Example: BRO's strategic roads along the LAC in Ladakh

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Border security

Border security is the management of India's land and coastal frontiers against infiltration, smuggling and grey-zone probes, from the LoC to the post-26/11 coastal grid. Smart fencing and integrated check posts are its instruments. It is the essay's territorial dimension of national security.

Example: Guarding India's land and maritime frontiers against infiltration and smuggling.

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Border Security Force (BSF)

The Border Security Force, raised in 1965, guards India's borders with Pakistan and Bangladesh and is the world's largest border-guarding force. It also deploys for counter-insurgency and elections. It matters as the first line of defence on the western and eastern frontiers.

Example: BSF's deployment along the Punjab border against drone smuggling

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Borgeet

Borgeet are devotional songs composed in the 15th-16th centuries by Srimanta Sankardev and his disciple Madhavdev, the founders of the Ekasarana Dharma in Assam. Written in Brajavali, a literary mix of Brajbhasha and Assamese, they praise Krishna and are still sung in Assam's sattras and namghars. For UPSC, Borgeet represent the Bhakti movement's Assamese strand and the region's distinctive religious literature.

Example: The devotional songs of Sankardev and Madhavdev sung in Assam's sattras and namghars.

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Borobudur

Borobudur is a 9th-century Mahayana Buddhist monument in Central Java, Indonesia, built under the Sailendra dynasty. Shaped as a giant mandala of nine stacked platforms topped by a central stupa, its walls carry narrative reliefs of the Buddha's life. For UPSC, it is evidence of ancient Indian cultural influence in Southeast Asia and a classic example cited in art-and-culture questions on Buddhist architecture beyond India.

Example: The 9th-century Sailendra-era monument in Central Java, now a UNESCO World Heritage site.

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borrowed

Borrowed is an ordinary English word meaning taken with the intention of returning, and in UPSC polity contexts it refers to provisions of the Indian Constitution borrowed from other constitutions, such as fundamental rights from the United States and parliamentary government from Britain. As a glossary term it needs no technical definition; its exam value is in recognising the comparative sources of constitutional features.

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Borrowers gain

In economics, the phrase 'borrowers gain' describes how inflation transfers wealth from lenders to borrowers. When prices rise, the real value of a fixed loan falls, so borrowers repay less in real terms while lenders receive less purchasing power. The effect is strongest when loans carry fixed interest rates. For UPSC, the phrase is useful in economy questions on inflation's distributional effects and on why unexpected inflation hurts savers.

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borrows from banks

Borrows from banks is a plain-language phrase describing how individuals, firms, and governments obtain credit from the banking system for consumption, investment, or deficit financing. In UPSC economy it connects to credit creation, money multiplier, and the crowding-out debate when government borrowing absorbs private savings. It carries no technical glossary definition; its value is in understanding banking's intermediation role.

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Bose Institute

India's pioneering multidisciplinary research institute, founded in 1917 in Kolkata by physicist and plant physiologist Jagadish Chandra Bose. As one of the country's oldest modern research centres, it works across physics, chemistry, biology and environmental science under the Department of Science and Technology. It symbolises the early institutionalisation of Indian science.

Example: Jagadish Chandra Bose demonstrated wireless signalling and plant responses at the institute he founded in 1917.

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Bose-Einstein condensate (BEC)

A state of matter formed when a gas of bosons is cooled to near absolute zero, so cold that the atoms collapse into the same quantum state and behave as a single superatom. Predicted by Satyendra Nath Bose and Albert Einstein in the 1920s, it was first created in 1995 by Eric Cornell and Carl Wieman, who shared the 2001 Nobel Prize for it. BECs let physicists observe quantum effects on a visible scale and underpin ultra-precise sensors and atomic clocks.

Example: The 1995 experiment at JILA cooled rubidium atoms to below a microkelvin above absolute zero to form the first BEC.

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Bose-Einstein statistics

The statistical rules governing particles with integer spin, called bosons, derived by Satyendra Nath Bose in 1924. Bose showed that Planck's radiation law follows naturally if photons are treated as indistinguishable particles, and Einstein extended the idea to atoms, predicting the condensate that now bears both names. It is one of the two great quantum statistical frameworks, alongside Fermi-Dirac statistics.

Example: Bose's 1924 paper deriving black-body radiation from photon statistics founded quantum statistics.

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Bose, Nehru and Lala Lajpat Rai

Subhas Chandra Bose, Jawaharlal Nehru and Lala Lajpat Rai were prominent Congress leaders who became closely associated with the early organised labour movement. Lajpat Rai was the first president of the All India Trade Union Congress, while Bose and Nehru presided over later AITUC sessions and supported workers' causes. For UPSC, the grouping shows how mainstream nationalists linked the labour movement with the struggle for swaraj.

Example: The AITUC's founding session in Bombay on 31 October 1920, with Lajpat Rai as first president and Bose and Nehru associated with the federation.

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Bose, Nehru and others

The phrase 'Bose, Nehru and others' refers to the radical and left-leaning Congress leadership, chiefly Subhas Chandra Bose and Jawaharlal Nehru, along with younger nationalists who pressed for more militant positions. They opposed dominion status under the Nehru Report and founded the Independence for India League in 1928 to demand purna swaraj. For UPSC, the phrase signals the left wing of the Congress in the late 1920s.

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bosons

Bosons are elementary or composite particles with integer spin that obey Bose-Einstein statistics, meaning any number of them can occupy the same quantum state (unlike fermions, which obey the Pauli exclusion principle). Paul Dirac named them in honour of Indian physicist Satyendra Nath Bose.

Example: Photons, which carry light and enable Bose-Einstein condensation at near absolute zero, are bosons.

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Boston Massacre

The Boston Massacre was the killing of five American colonists by British soldiers in Boston on 5 March 1770. A confrontation between a crowd and troops outside the Custom House escalated into gunfire, and Patriot leaders used the incident as propaganda against British rule. For UPSC, it is a landmark event in the build-up to the American Revolution, illustrating how colonial grievances over taxation turned violent.

Example: The death of Crispus Attucks and four others in Boston on 5 March 1770.

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Boston Tea Party (December 1773)

The Boston Tea Party was a December 1773 protest in which members of the Sons of Liberty, disguised as Native Americans, boarded three ships in Boston harbour and dumped 342 chests of East India Company tea into the water. It was aimed at the Tea Act of 1773, seen as taxation without representation. For UPSC, it is the trigger event that led Britain to pass the Intolerable Acts and pushed the colonies toward the American Revolution.

Example: The destruction of the East India Company's tea cargo in Boston harbour on 16 December 1773.

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BOT

BOT (Build-Operate-Transfer) is a public-private partnership model in which a private firm finances and builds an infrastructure project, operates it for a fixed concession period to recover its investment through user charges, and then transfers ownership back to the government. It shifts construction and commercial risk to the private partner while the state retains eventual ownership. For UPSC, it is the classic PPP highway model studied under infrastructure financing and NHAI contracting.

Example: Many National Highway stretches awarded by NHAI on a BOT (Toll) basis, where the concessionaire collects tolls for the concession period before handing the road back.

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BOT → BOOT → BOO

This arrow sequence describes a spectrum of private-sector participation in infrastructure, ordered by increasing private ownership. BOT (Build-Operate-Transfer) returns the asset to the state, BOOT (Build-Own-Operate-Transfer) adds temporary legal ownership during the concession, and BOO (Build-Own-Operate) lets the private firm own the asset permanently while selling its output under long-term agreements. For UPSC, the spectrum tests how risk, ownership, and control are allocated across PPP variants in infrastructure.

Example: Independent power producers building thermal plants on a BOO basis and selling electricity to state discoms through long-term power purchase agreements.

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BOT, BOOT, BOO, EPC

These are the standard project-delivery and contracting models used for large infrastructure. BOT, BOOT, and BOO are public-private partnership variants differing in who owns the asset and for how long, while EPC (Engineering, Procurement, Construction) is a turnkey contract in which one contractor designs, procures, and builds the project for a fixed price and hands it over fully to the government. For UPSC, they frame questions on infrastructure financing, risk sharing, and why agencies choose one model over another.

Example: NHAI now awards most new highway stretches on EPC or HAM (Hybrid Annuity) terms rather than BOT toll, after private appetite for traffic risk fell.

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both

Both has no standalone technical meaning in the UPSC syllabus; it is an ordinary word of the question paper, not a concept to be defined. In answer writing it functions as a signpost that two named items, policies or arguments are to be treated together, so a prompt pairing two themes expects balanced coverage of each side. For prelims, it is worth remembering that statements using 'both' demand that each half be verified independently before the option is accepted.

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bottom-up

Bottom-up is a development approach in which planning and decision making begin at the grassroots, with local communities identifying needs and priorities, rather than directives flowing down from the top. India's Panchayati Raj institutions and Kerala's People's Plan campaign embody this model. For UPSC GS-2, bottom-up versus top-down framing strengthens answers on decentralisation, governance, and participatory planning.

Example: Kerala's People's Plan Campaign, launched 1996

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bottom-up approach

The bottom-up approach in nanotechnology builds nanostructures atom by atom or molecule by molecule through processes like self-assembly, chemical synthesis and crystal growth. It contrasts with the top-down approach, which carves smaller structures out of larger bulk material.

Example: Growing carbon nanotubes by chemical vapour deposition is a bottom-up fabrication technique.

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botulinum toxin

Botulinum toxin is the potent neurotoxin produced by Clostridium botulinum, the most poisonous natural substance known and a listed bioweapon agent. In tiny medical doses it is the drug Botox.

Example: botulinum toxin is classified as a Category A bioterrorism agent

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Boundary

In UPSC usage, a boundary is a line marking the limit of a state's territory or administrative unit. Unlike a frontier, which is a zone, a boundary is a precisely defined line, such as the Line of Actual Control between India and China or the Radcliffe Line between India and Pakistan. The term matters for questions on border management, disputes and the distinction between settled and unsettled borders.

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bourgeoisie

Bourgeoisie is the Marxist term for the class that owns the means of production (factories, land, capital) and profits from the labour of others. It includes industrialists, big merchants, and financiers who dominate economic and political life under capitalism. It matters for UPSC because it anchors questions on Marxism, class struggle, the Russian Revolution, and critiques of capitalism in GS-1 and GS-4 ethics.

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boustrophedon

Boustrophedon is an ancient writing style in which lines run alternately left to right and right to left, like an ox turning at the end of each furrow while ploughing. It appears in some early Greek and other ancient inscriptions and represents a transitional stage before a fixed writing direction. It matters for UPSC because scripts, epigraphy, and writing systems are recurring prelims topics under ancient Indian and world history.

Example: Archaic Greek inscriptions written in alternating directions

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Boxer Rebellion

The Boxer Rebellion was an anti-foreign uprising in China from 1899 to 1901 led by the Yihetuan, or Boxers, who opposed foreign influence and Christian missionaries. The revolt besieged foreign legations in Beijing until an Eight-Nation Alliance, including Japan, Russia and Britain, crushed it. For UPSC, it marks the climax of China's semi-colonial crisis before the 1911 Revolution and a key event in modern world history.

Example: The 55-day siege of the foreign legations in Beijing in the summer of 1900.

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Boycott Resolution

The Boycott Resolution is the 1905 Congress resolution endorsing the boycott of British goods as a weapon against the Partition of Bengal. Passed at the Benares session presided over by Gopal Krishna Gokhale, it formally adopted boycott alongside swadeshi as Congress policy. For UPSC, it marks the moment the national movement embraced mass economic agitation, turning the Swadeshi movement into a popular campaign.

Example: The resolution followed the 16 October 1905 day of mourning when Bengal was partitioned, and it legitimised the bonfires of foreign cloth that followed.

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Boycott Resolution of 7 August 1905

The Boycott Resolution was adopted at a mass meeting at Calcutta's Town Hall on 7 August 1905, in response to the announced partition of Bengal. It called for a boycott of British goods and the promotion of swadeshi products. The resolution launched the Swadeshi movement. For UPSC, the date is the formal starting point of the boycott-and-swadeshi agitation that shaped the Extremist phase of the national movement.

Example: The Calcutta Town Hall meeting of 7 August 1905 that adopted the boycott of British goods.

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BPaLM regimen

The BPaLM regimen is a six-month, all-oral treatment regimen for multidrug-resistant and rifampicin-resistant tuberculosis (MDR/RR-TB) recommended by the World Health Organization in its 2022 treatment guidelines. It combines four drugs, bedaquiline, pretomanid, linezolid and moxifloxacin (the initials give the name), replacing older regimens that lasted 9 to 18 months and often included painful injectables. Trials such as TB-PRACTECAL showed cure rates near 89 percent, making it the preferred option for most MDR/RR-TB patients and a major milestone in the fight to end TB.

Example: WHO's 2022 guidelines made the 6-month BPaLM regimen the treatment of choice for most patients with MDR/RR-TB, replacing regimens that lasted up to 18 months.

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BPKP (Bhartiya Prakritik Krishi Padhati)

BPKP (Bhartiya Prakritik Krishi Paddhati) is the sub-mission under NMSA promoting traditional natural farming practices across the country. It supports on-farm input production, farmer training and certification for chemical-free agriculture. For UPSC it is the national-programme face of the natural-farming movement.

Example: Village clusters adopting cow-based inputs under BPKP show the sub-mission's field model.

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BPL

BPL, or Below Poverty Line, denotes households classified as living below the poverty line for targeting welfare benefits. BPL identification has shaped schemes such as subsidised foodgrain through the Public Distribution System and rural housing assistance. The methodology has been contested, with the Tendulkar Committee (2009) and Rangarajan Committee (2014) proposing different poverty lines, while the Socio-Economic Caste Census 2011 shifted focus to deprivation criteria. It is foundational for UPSC questions on poverty measurement.

Example: The Antyodaya Anna Yojana targets the poorest among BPL families with 35 kg of grain monthly.

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BPL (Below Poverty Line)

BPL (Below Poverty Line) is the administrative category of households identified as poor and entitled to the highest PDS subsidy under the Targeted PDS. BPL lists were drawn from periodic surveys and were notorious for exclusion of the genuinely poor and inclusion of the non-poor. For UPSC, BPL identification errors are the textbook targeting failure.

Example: A landless family missing from the BPL list despite clear poverty illustrates the exclusion error.

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BPO promotion scheme

The India BPO Promotion Scheme is a Digital India programme that incentivises information technology enabled services and BPO units to set up operations in smaller towns and cities rather than the metros. Implemented through STPI, it offers financial support per seat to spread digital employment geographically and curb migration to big cities. For UPSC, it is an example of using fiscal incentives for balanced regional development and employment generation in the services sector.

Example: BPO and ITES centres established in tier-2 and tier-3 towns under the scheme, creating local white-collar jobs outside the metropolitan hubs.

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Bragg father and son

William Henry Bragg and William Lawrence Bragg shared the 1915 Nobel Prize in Physics for X-ray crystallography; Lawrence remains the youngest science laureate.

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Brahmacharya

Brahmacharya is the first of the four ashramas, or stages of life, in the traditional Hindu scheme of varnashrama dharma. It is the stage of celibate studentship, when a young person lives with a guru to study the Vedas and learn discipline. The other stages are grihastha, vanaprastha and sannyasa. For UPSC, brahmacharya is essential to ancient Indian social organisation and to ethics questions on the aims of life.

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Brahmadeya

Brahmadeya were tax-free land grants, usually whole villages, given by kings to Brahmanas, especially under the Pallavas and Cholas. The grantees enjoyed revenue rights and often local judicial authority, and such grants spread Brahmanical culture into new regions. For UPSC, brahmadeya is central to questions on early medieval agrarian expansion, the growth of landlordism and state formation in South India.

Example: Chola-period villages granted tax-free to Brahmana donees in the Kaveri delta.

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Brahmagiri

Brahmagiri is an archaeological site in Karnataka's Chitradurga district known for Ashokan Minor Rock Edicts found there. The edicts, in Brahmi script, record Ashoka's dhamma policy and his personal connection with the Buddhist sangha. The site also shows Neolithic to Megalithic habitation layers. For UPSC, Brahmagiri is a classic prelims fact linking Ashokan edicts with their find-spots.

Example: The Minor Rock Edicts of Ashoka discovered at Brahmagiri.

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Brahmagupta's Brahmasphutasiddhanta

The Brahmasphutasiddhanta, meaning 'Correctly Established Doctrine of Brahma', is the 628 CE astronomical and mathematical treatise of Brahmagupta. It gives the first systematic rules for computing with zero and negative numbers, solutions to indeterminate equations and a formula for the area of a cyclic quadrilateral. Later translated into Arabic, it influenced Islamic mathematics. For UPSC, it anchors questions on India's contributions to science.

Example: Brahmagupta's definition of zero as the result of subtracting a number from itself.

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Brahman

Brahman is the ultimate, unchanging reality in Hindu philosophy, the ground of all existence described in the Upanishads. It is conceived as nirguna (without attributes) and saguna (with attributes, as Ishvara), and realising one's identity with Brahman is the goal of liberation (moksha). For UPSC, Brahman is foundational to Indian philosophy questions on Vedanta, the Upanishads and the contrast with Buddhist thought.

Example: The Chandogya Upanishad's teaching 'Tat Tvam Asi' (Thou art That) expresses the identity of the individual self (atman) with Brahman.

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Brahmana

Brahmana denotes the priestly varna, the first of the four varnas in the traditional social order described in texts like the Purusha Sukta and the Manusmriti. Its prescribed duties were study, teaching, performing sacrifices and receiving gifts. For UPSC, the concept underlies questions on the varna system, ancient Indian social hierarchy and the duties-based ordering of society.

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Brahmanas

The Brahmanas are Vedic prose texts attached to each Samhita, explaining the meaning and procedure of Vedic rituals. Composed after the Samhitas, works like the Shatapatha and Aitareya Brahmanas contain early philosophical speculation that leads into the Aranyakas and Upanishads. For UPSC, they are important as sources for Vedic religion and as a bridge between ritual literature and later Vedanta.

Example: The Shatapatha Brahmana, attached to the Shukla Yajurveda, is the most extensive of them.

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Brahmanical gods

Brahmanical gods are the deities worshipped in Vedic Brahmanism, the ritual tradition centred on sacrifice. The principal gods include Indra, the warrior king of gods; Agni, the fire god and messenger of sacrifice; and Varuna, upholder of cosmic order. For UPSC, they matter for questions on the Rigvedic pantheon and on how Vedic deities were later absorbed into Puranic Hinduism.

Example: Indra, Agni and Varuna as praised in the hymns of the Rigveda.

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Brahmanical patriarchy

Brahmanical patriarchy is a concept developed by historian Uma Chakravarti to describe how patriarchy in India is intertwined with the caste order. It argues that upper-caste control over women's sexuality, through rules of marriage and purity, sustains caste boundaries and lineage. For UPSC, the term is key to GS-1 questions on gender, caste and the social dimensions of women's subordination.

Example: Uma Chakravarti's formulation of the concept in her 1993 essay.

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Brahmaputra

The Brahmaputra is the great transboundary river of the eastern Himalayas, rising as the Yarlung Tsangpo in Tibet, entering Arunachal Pradesh as the Siang (Dihang), flowing through Assam, and joining the Ganga system in Bangladesh before meeting the sea. Notorious for floods and shifting channels, it sustains Assam's agriculture and ecology. For UPSC, it is central to questions on transboundary rivers, floods and India-China water relations.

Example: Majuli island in Assam, the world's largest river island, is formed by the Brahmaputra's braided channels.

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Brahmaputra/Yarlung Tsangpo (China-India-Bangladesh)

The Brahmaputra rises as the Yarlung Tsangpo in Tibet, flows through Arunachal Pradesh and Assam as the Brahmaputra, and enters Bangladesh before joining the Ganga system. The three riparian states, China, India and Bangladesh, share concerns over dams, diversions and flood data. For UPSC, the river is central to questions on transboundary water governance and India-China strategic issues.

Example: The bilateral arrangements under which China shares flood-season hydrological data on the Brahmaputra with India.

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Brahmi

Brahmi is the ancient Indian script in which Ashoka's third-century BCE edicts were inscribed, written left to right and ancestral to nearly all later Indian scripts including Devanagari. Its decipherment by James Prinsep in 1837 unlocked Mauryan history. For UPSC, Brahmi versus Kharosthi (used in the northwest, written right to left) is a classic script-and-inscription question.

Example: the Major Rock Edicts of Ashoka at Girnar and Dhauli, engraved in Brahmi Prakrit

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Brahmi script

Brahmi is one of the oldest writing systems of India, used from about the 3rd century BCE and the script of Ashoka's edicts. Written left to right, it is the ancestor of most modern Indian scripts, including Devanagari. It was deciphered in 1837 by James Prinsep, which unlocked Ashokan history for modern scholarship. For UPSC, Brahmi is a staple of ancient Indian epigraphy and art-and-culture questions.

Example: James Prinsep's 1837 decipherment of the script on Ashoka's edicts.

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Brahmo Sabha in Calcutta in 1828

The Brahmo Sabha was founded in Calcutta in August 1828 by Raja Rammohan Roy as a reformist religious association promoting monotheism and opposing idolatry, sati and caste rigidity. It met weekly for worship and discussion, and was renamed the Brahmo Samaj in 1830. For UPSC, its founding is the conventional starting point of the nineteenth-century socio-religious reform movements.

Example: Raja Rammohan Roy's establishment of the Sabha in Calcutta in August 1828.

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Brahmo Samaj

The Brahmo Samaj was the socio-religious reform movement founded by Raja Rammohan Roy in 1828 as the Brahmo Sabha and renamed in 1830. It preached monotheism, opposed sati, child marriage and idolatry, and promoted rational inquiry. It later split into the Adi Brahmo Samaj under Debendranath Tagore and the Sadharan Brahmo Samaj. For UPSC, it is the flagship example of nineteenth-century reform and the Bengal Renaissance.

Example: The 1866 split into the Adi Brahmo Samaj and the Brahmo Samaj of India.

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BrahMos

BrahMos is the supersonic cruise missile jointly developed by India's DRDO and Russia's NPO Mashinostroyeniya, named after the Brahmaputra and Moskva rivers. Flying at about Mach 2.8, it can be launched from land, sea, air and submarine platforms with pinpoint accuracy. For UPSC, BrahMos is the flagship of India-Russia defence cooperation and a milestone in India's defence exports.

Example: In January 2022 the Philippines signed a 375 million dollar deal for three BrahMos batteries, and India delivered the first batch in April 2024, its first BrahMos export.

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braided channel

A braided channel is a river pattern in which the flow splits into many interlacing channels separated by temporary sandbars and islands, usually where the river carries a heavy sediment load across a gentle slope. Channels keep shifting, making navigation and stable banks difficult. It matters for UPSC because the Brahmaputra's braided reach in Assam is a classic physical geography case, linked to floods, erosion, and riverine ecology in prelims and GS-1.

Example: The Brahmaputra in Assam

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brain circulation

Brain circulation is the counter to brain drain: skilled diasporas returning, investing and transferring knowledge, as with India's tech returnees and Global Capability Centres. It reframes emigration as a network, not a loss. It is the essay's optimistic update to the talent-mobility story.

Example: Diaspora return and knowledge flows turning brain drain into a network.

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Brain drain

Brain drain is the emigration of skilled professionals, doctors, engineers, researchers, to richer countries, long lamented as a loss of national investment. The essay pairs it with brain circulation for balance. It is the classic frame for talent-mobility debates.

Example: The emigration of skilled professionals to richer countries.

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Brain drain and service paralysis

Brain drain and service paralysis is the exodus of doctors, teachers and officials from insurgency-affected areas, leaving services collapsed. Maoists have assassinated or threatened service providers to enforce the vacuum. It matters because a region without schools or clinics is easier to dominate.

Example: Teachers refusing postings in interior Bastar

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Braj

Braj is the cultural region of western Uttar Pradesh around Mathura and Vrindavan, associated with the legends of Krishna. It was the heartland of Krishna bhakti, producing a rich tradition of devotional poetry, music and temple architecture. For UPSC, Braj matters for questions on the Bhakti movement, medieval religious geography and the literary heritage of Brajbhasha.

Example: The Krishna-centred pilgrimage tradition of Mathura and Vrindavan.

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Brajbhasha

Brajbhasha is the literary language of the Braj region, a western Hindi dialect that became the dominant medium of Krishna devotional poetry in medieval India. Poets like Surdas composed the Sursagar in Brajbhasha, and it was used across North India for bhakti verse. For UPSC, it is important for questions on medieval literature, the Bhakti movement and the evolution of Hindi.

Example: Surdas's Sursagar, composed in Brajbhasha.

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Brazil's Zero Hunger (Fome Zero)

Brazil's Zero Hunger (Fome Zero) is the 2003 Brazilian programme that combined cash transfers, school meals, family-farming support and food banks to cut hunger sharply. Its Bolsa Familia cash transfer became the global model for conditional welfare. For UPSC it is the celebrated international comparator for India's food-security efforts.

Example: Its conditional cash transfers, paying poor families to keep children in school, inspired welfare design worldwide.

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Break in the monsoon

A break in the monsoon is a dry spell of a week or more during the June to September southwest monsoon season, when rainfall weakens over most of India. It occurs when the monsoon trough shifts to the Himalayan foothills, confining rain to the hills while the plains stay dry. For UPSC, monsoon breaks matter for questions on the monsoon mechanism and their impact on kharif crops and water availability.

Example: Extended dry spells in August that delay sowing of kharif crops in northwest India.

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Bretton Woods

Bretton Woods is the 1944 conference in New Hampshire, USA, where 44 Allied nations designed the post-war economic order. It created a system of fixed exchange rates anchored to the US dollar, which was convertible to gold, and established the International Monetary Fund and the World Bank. For UPSC, Bretton Woods is the institutional foundation of the liberal international economic order and the starting point of questions on IMF and World Bank reform.

Example: The IMF's conditionality-based lending, seen in its bailout during India's 1991 balance of payments crisis, flows directly from the Bretton Woods design.

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Bretton Woods in 1944

The Bretton Woods Conference of 1944 is the United Nations Monetary and Financial Conference held at Bretton Woods, New Hampshire, where 44 Allied nations designed the post-war economic order. It created the International Monetary Fund and the World Bank, fixed exchange rates to the US dollar convertible into gold, and institutionalised multilateral cooperation. It matters for UPSC because it anchors questions on the global financial architecture, India's founding role, and IMF quota reform debates.

Example: India is a founding member of both the IMF and the World Bank, the two institutions born at Bretton Woods.

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Brexit

Brexit is the United Kingdom's withdrawal from the European Union following the June 2016 referendum, completed on 31 January 2020. It ended British membership of the EU single market and customs union, forced a renegotiation of trade, migration and Northern Ireland arrangements, and reshaped European geopolitics. For UPSC it is examined in international relations for its impact on India, especially the post-Brexit India-UK free trade negotiations and diaspora concerns.

Example: The UK-India free trade agreement concluded in 2025 was negotiated in the shadow of Brexit.

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Brexit (2016 referendum, 2020 withdrawal)

Brexit is the United Kingdom's withdrawal from the European Union, voted for in the referendum of 23 June 2016 and completed on 31 January 2020. It reduced the EU from 28 to 27 members and ended free movement between Britain and the bloc.

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Brezhnev Doctrine

The Brezhnev Doctrine is the Soviet policy, articulated in 1968, asserting the limited sovereignty of socialist states and the USSR's right to intervene where socialism was threatened. It justified the Warsaw Pact invasion of Czechoslovakia during the Prague Spring, claiming a duty to defend the socialist community. For UPSC, it explains Cold War interventionism and contrasts with India's non-aligned stance.

Example: In August 1968 Warsaw Pact troops entered Czechoslovakia to crush Alexander Dubcek's reformist government.

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BRI

The Belt and Road Initiative is China's transcontinental connectivity programme launched in 2013, combining the overland Silk Road Economic Belt with the 21st century Maritime Silk Road to link Asia, Europe, and Africa through ports, railways, pipelines, and digital corridors financed largely by Chinese lending. For UPSC, it matters because of the China-Pakistan Economic Corridor passing through Pakistan-occupied Kashmir, which India opposes on sovereignty grounds, and the wider debate over debt sustainability in partner countries.

Example: The China-Pakistan Economic Corridor, a BRI flagship linking Kashgar to Gwadar port, which India has consistently opposed because it traverses territory it claims.

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Bribe giver

A bribe giver is the person who offers or gives an undue advantage to a public servant, made directly punishable by the Prevention of Corruption (Amendment) Act, 2018. The amendment prescribes imprisonment up to seven years with a fine, while protecting a person compelled to pay a bribe who reports the matter to law enforcement within seven days. It matters for UPSC as a key GS-4 and governance topic on corruption, whistleblower protection, and the demand side of graft.

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BRIC began as an acronym, not a bloc

BRIC began in 2001 as a Goldman Sachs analyst's acronym, coined by economist Jim O'Neill to group Brazil, Russia, India, and China as the large emerging economies likely to reshape global growth, not as any political organisation. Only later did the four states convene, with the first summit at Yekaterinburg in 2009, turning an investment-bank label into a diplomatic bloc, with South Africa joining in 2010 to make it BRICS.

Example: The first BRIC summit at Yekaterinburg, Russia, in 2009, when the four leaders met formally for the first time, eight years after the acronym was coined.

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BRICS

BRICS is an intergovernmental grouping of major emerging economies, founded as BRIC with the first leaders' summit at Yekaterinburg in 2009. South Africa's entry in 2010 made it BRICS; it expanded in January 2024 with Egypt, Ethiopia, Iran and the UAE, and Indonesia became a full member in January 2025. Its New Development Bank, headquartered in Shanghai, funds infrastructure in developing countries. For UPSC, BRICS is central to GS-2 debates on multipolarity and Global South representation.

Example: The New Development Bank, agreed at the 2014 Fortaleza summit, financing infrastructure and sustainable development projects.

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bridge between elite petitioning and mass satyagraha

This phrase describes the transitional phase in India's freedom struggle when politics moved from the Moderates' elite petitioning and resolutions to Gandhi's mass satyagraha. The Extremist wing, with leaders like Tilak, mobilized the wider public through festivals, the press, and swadeshi, creating the bridge. It matters for UPSC because this moderate-extremist-Gandhian sequence is a core mains and prelims theme in the national movement.

Example: Bal Gangadhar Tilak and the Extremist phase (1905-1919)

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Brigadier P.S. Bhagat

Brigadier P. S. Bhagat, later Lieutenant General Premindra Singh Bhagat, was an Indian Army officer awarded the Victoria Cross for gallantry in the Sudan theatre of World War II, where as a young sapper officer he cleared 15 minefields over 55 miles under enemy fire in early 1941. he commanded formations in the 1947, 1965 and 1971 wars and co-authored the Henderson Brooks-Bhagat Report on the 1962 war, and matters for UPSC as a landmark of Indian military honour.

Example: He was invested with the Victoria Cross by Viceroy Lord Linlithgow at Delhi on 10 November 1941.

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Brihadaranyaka

The Brihadaranyaka Upanishad is the oldest and longest of the principal Upanishads, embedded in the Shatapatha Brahmana of the Shukla Yajurveda. It contains the celebrated dialogues of the sage Yajnavalkya, including the teaching of neti neti, not this, not this, and his exhortation to Maitreyi that the Self is the true object of knowledge. It matters for UPSC because Vedic literature and ancient Indian philosophy are core Prelims topics in art, culture and religion.

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Brihadeeswara (Rajarajeswaram) temple

The Brihadeeswara temple at Thanjavur, originally called Rajarajeswaram, is the grand Chola Shiva temple built by Rajaraja Chola I and completed around 1010 CE. Its soaring vimana, nearly 66 metres tall and crowned by a single capstone, exemplifies Dravida architecture, while its walls carry Tamil inscriptions and frescoes recording donations and rituals. It is a UNESCO World Heritage site as part of the Great Living Chola Temples, and for UPSC it is the textbook case of Chola temple architecture.

Example: Its inscriptions record detailed land grants and the names of the dancers and musicians maintained by the temple establishment.

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Brihadeeswara at Thanjavur

The Brihadeeswara temple at Thanjavur, also called the Periya Kovil or Big Temple, is the monumental Shiva shrine raised by Rajaraja Chola I around 1010 CE. Its 66-metre vimana, sculpted gopurams, massive Nandi pavilion and extensive Tamil inscriptions make it the supreme expression of Chola imperial architecture, recognised by UNESCO as part of the Great Living Chola Temples. For UPSC it is the most frequently asked temple in art-and-culture questions on the Chola period.

Example: The temple's millennium was celebrated with state ceremonies in Thanjavur in 2010.

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Brihadeeswara temple

Brihadeeswara, meaning the Great Lord, is the name shared by the great Chola Shiva temples, notably Rajaraja Chola I's temple at Thanjavur and Rajendra Chola I's temple at Gangaikonda Cholapuram. Both are Dravida masterpieces with towering vimanas, rich inscriptions and Chola frescoes, and both belong to the Great Living Chola Temples UNESCO listing. For UPSC, comparing the two tests understanding of how Chola imperial architecture evolved from father to son.

Example: Rajendra I's Gangaikonda Cholapuram temple was built to commemorate his victorious expedition to the Ganga.

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Brihat Samhita

The Brihat Samhita is a sixth-century Sanskrit encyclopaedia by Varahamihira, the renowned astronomer-astrologer of the classical age. Its 106 chapters range over astronomy, astrology, monsoon forecasting, architecture, gemmology, agriculture and omens, preserving a remarkable snapshot of ancient Indian applied science. It matters for UPSC as a primary source for science and technology in ancient India and a staple of art-and-culture and history questions.

Example: Its chapters on architecture are cited for the ancient Indian science of town and temple planning.

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brilliant social and economic evidence

This phrase refers to the rich body of historical evidence, such as literature, inscriptions, travellers' accounts, and archaeological finds, that reveals how people lived, worked, and traded. For UPSC, the ability to cite such evidence is central to mains answers on ancient and medieval society and economy. It matters because questions often ask candidates to reconstruct social and economic life from diverse sources rather than from political narratives alone.

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Bringing Green Revolution to Eastern India (BGREI, 2010-11)

Bringing Green Revolution to Eastern India is a sub-scheme of the Rashtriya Krishi Vikas Yojana launched in 2010-11 to extend Green Revolution gains to eastern India. It targets rice-based farming systems in states such as Bihar, eastern Uttar Pradesh, West Bengal, Odisha, Chhattisgarh, Jharkhand and Assam through cluster demonstrations, quality seed distribution and farm machinery support. It matters for UPSC as a case study in regionally differentiated agricultural policy and the debate on a second green revolution.

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Britain and the USA

In UPSC usage, Britain and the USA denotes the core Anglo-American partnership that shaped the post-1945 international order, from wartime cooperation such as the Atlantic Charter of 1941 to the Cold War Western bloc, NATO and the Five Eyes intelligence network. The pairing appears in questions on the special relationship, American pressure on British decolonisation, and contemporary Indo-Pacific alignments. It is a framing device in modern world history and international relations answers.

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Britain, France, Italy and Japan

Britain, France, Italy and Japan formed the Council of Four, the dominant powers at the 1919 Paris Peace Conference, whose leaders drafted the Treaty of Versailles and the Covenant of the League of Nations. Their closed-door bargaining over reparations, mandates and self-determination decided the post-war settlement. For UPSC the quartet anchors modern world history questions on the First World War settlement and the structural flaws that doomed the League.

Example: The Council of Four excluded the defeated Central Powers and Soviet Russia from the peace negotiations.

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British Criminal Tribes Act

The Criminal Tribes Act, 1871 was a colonial law that notified entire tribes and communities as habitually criminal, subjecting them to registration, surveillance and restrictions on movement. It stigmatised generations of nomadic communities and was repealed after Independence, with the affected groups denotified in 1952. Its legacy survives in the Habitual Offenders Acts and in the continuing marginalisation of denotified, nomadic and semi-nomadic tribes, a recurring UPSC social-justice theme.

Example: The Renke Commission (2008) studied the development needs of denotified tribes.

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British House of Commons in 1892

The British House of Commons in 1892 is associated in UPSC history with Dadabhai Naoroji's election from Central Finsbury, making him the first Indian to sit in the British Parliament. He used the platform to press the drain-of-wealth argument and Indian grievances, linking constitutional agitation in Britain with the early Congress movement. It matters for Prelims and Mains questions on moderate nationalism and the international face of the freedom struggle.

Example: Naoroji's 1892 victory followed his narrow defeat at Holborn in the 1885 general election.

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British Indian Army grew to 2.5 million volunteers

The British Indian Army grew to about 2.5 million volunteers during the Second World War, becoming the largest all-volunteer force in history. Recruited largely from the designated martial races of Punjab and the north-west, it fought in North Africa, Italy, the Middle East and Burma. For UPSC this expansion explains wartime British politics in India, the context of the Cripps Mission, the Quit India Movement and the Indian National Army's appeal.

Example: Indian divisions played a decisive role in the Burma campaign against Japan.

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British institutional engineering

In UPSC political science, British institutional engineering refers to the deliberate colonial design of Indian public institutions, from the 1858 transfer of power to the Government of India Acts of 1909, 1919 and 1935. It shaped federalism, separate electorates, the civil services and legislative councils, leaving an institutional imprint visible in the 1950 Constitution. It appears in GS-2 and political science optional questions on constitutional development and institutional continuity.

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British interference in Kutch's internal feuds

British interference in Kutch's internal feuds describes how the East India Company exploited succession disputes and factional strife in the Kutch state to impose the treaties of 1816 and 1819, deposing Rao Bharmalji II and installing a minor under a British-supervised regency. The episode exemplifies the wider pattern of internal disorder serving as a pretext for British paramountcy over princely states. For UPSC it illustrates subsidiary-alliance-era expansion before the formal doctrine of lapse.

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British machine-made goods entered India virtually duty-free

British machine-made goods entered India virtually duty-free under the one-way free trade imposed by colonial rule, while Indian exports faced tariffs and Indian industry received no protection. Lancashire textiles flooded the market at nominal duties, ruining handloom weavers and accelerating deindustrialisation. For UPSC this asymmetry is central to economic nationalism, the drain-of-wealth thesis and the nationalist critique of colonialism in both Prelims and Mains.

Example: Dadabhai Naoroji and R. C. Dutt used this trade asymmetry to build the drain theory.

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British possessions

In British constitutional history, 'British possessions' is the term for territories in India under direct British rule, as distinct from the princely states under Indian rulers. The phrase appears in statutes such as Pitt's India Act of 1784, and after the Government of India Act, 1858, all these possessions passed from the East India Company to the Crown. For UPSC, the distinction underlies questions on the administrative and legal geography of colonial India.

Example: The three Presidencies of Bengal, Madras and Bombay were the principal British possessions, while Hyderabad and Mysore remained princely states.

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bronze

Bronze is an alloy made chiefly of copper and tin, harder and more durable than either metal alone. Its discovery enabled stronger tools, weapons, and art, marking the Bronze Age in many civilizations. It matters for UPSC because the Harappan civilization is studied as a Bronze Age culture, and questions on metallurgy, urbanization, and technology in ancient India regularly feature bronze in prelims.

Example: The bronze Dancing Girl statuette of Mohenjo-daro

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bronzes

Bronzes are sculptures and artifacts cast in bronze, prized in Indian art for their fine detail and durability. The finest examples are the Chola bronzes of the 9th to 13th centuries, such as the Nataraja, cast by the lost-wax method for temple worship. They matter for UPSC because art and culture questions in prelims and GS-1 frequently test Chola bronzes, the lost-wax technique, and bronze finds of the Harappan period.

Example: The Chola Nataraja bronze

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Brown (leather and cocoa)

Brown is the colour-revolution label covering leather and cocoa, the brown-hued products of animal hides and cacao beans. The Brown Revolution denotes growth in leather processing and cocoa cultivation as value-added farm-linked industries. For UPSC it is the niche entry in the colour-revolution series.

Example: Tamil Nadu's leather clusters and Kerala's cocoa intercropping illustrate the Brown Revolution's two strands.

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Brown or black hydrogen

The most polluting grade of hydrogen, produced by gasifying coal (lignite is called brown coal, bituminous coal is black coal) without capturing the carbon dioxide released. It emits large quantities of CO2 and is the cheapest but dirtiest production route. UPSC contrasts it with grey hydrogen (gas, no capture), blue hydrogen (gas with capture) and green hydrogen (renewable electrolysis).

Example: Hydrogen made from coal gasification in coal-rich regions is classified as brown or black hydrogen.

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BRSR

BRSR (Business Responsibility and Sustainability Reporting) is SEBI's mandatory ESG disclosure framework, introduced in 2021, requiring the top 1,000 listed companies by market capitalisation to report on environmental, social, and governance performance from 2022-23 onward. It standardises reporting on emissions, water use, workforce diversity, and governance practices in the annual report. For UPSC, it connects corporate regulation, sustainable finance, and India's climate commitments in economy and environment questions.

Example: Large listed companies now publish a dedicated BRSR section in their annual reports, disclosing carbon emissions and board-level governance metrics in a uniform format.

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Bru-Reang agreement

The Bru-Reang agreement is the January 2020 settlement to permanently resettle over 35,000 Bru (Reang) tribals displaced from Mizoram to Tripura since 1997, with land, housing and a financial package. It matters as the resolution of one of India's longest internal displacement crises.

Example: Resettlement of Bru families in Tripura under the 2020 package

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Brucellosis

Brucellosis is the bacterial zoonotic disease causing abortions in cattle and undulant fever in humans, transmitted through unpasteurised milk and contact. It is targeted alongside FMD under the National Animal Disease Control Programme. For UPSC it illustrates the animal-human health link of the One Health approach.

Example: Calfhood vaccination of female calves against brucellosis protects both herds and milk consumers.

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Brundtland Commission (1987)

Formally the World Commission on Environment and Development, set up by the UN in 1983 and chaired by former Norwegian Prime Minister Gro Harlem Brundtland. Its 1987 report, Our Common Future, gave the classic definition of sustainable development as development that meets present needs without compromising the ability of future generations to meet theirs. The report made the environment-development linkage the centre of global policy and led toward the 1992 Rio Earth Summit.

Example: The phrase sustainable development entered global policy from the Brundtland report Our Common Future (1987).

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Brundtland Commission's

Brundtland Commission's refers to the World Commission on Environment and Development chaired by Gro Harlem Brundtland, whose 1987 report Our Common Future coined sustainable development. Its formula remains the starting point of every environment essay. The possessive form marks the article's citation of the definition's source.

Example: The 1987 Brundtland report Our Common Future that defined sustainable development.

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brutal repression

Brutal repression refers to the harsh use of force by a state to crush dissent, including arrests, firing on crowds, and martial-law measures. In the colonial context it describes Britain's responses to revolts and movements, from 1857 to the Rowlatt era. It matters for UPSC because mains answers on the freedom struggle must weigh repression against resistance, and prelims often tests events like the Jallianwala Bagh massacre of 1919.

Example: The Jallianwala Bagh massacre (1919)

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Bt brinjal

A genetically modified brinjal (eggplant) developed with a Bt gene to resist the fruit-and-shoot borer pest. India's Genetic Engineering Appraisal Committee recommended it for commercial release in October 2009, but Environment Minister Jairam Ramesh imposed an indefinite moratorium in February 2010 after public consultations and protests. It remains India's cautionary precedent on GM food crops, while Bangladesh commercialised Bt brinjal in 2013.

Example: The 2010 moratorium on Bt brinjal is the standard UPSC example of the precautionary principle in GM regulation.

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Bt cotton

Cotton genetically engineered with genes from the soil bacterium Bacillus thuringiensis (Bt), producing proteins toxic to bollworm pests. Approved for commercial cultivation in India in March 2002, it now covers the overwhelming majority of India's cotton area and sharply cut bollworm pesticide use in its early years. Its later vulnerability to pink bollworm is a standard case study on pest resistance to a single toxin.

Example: Bt cotton's cry proteins kill American bollworm larvae, which reduced insecticide sprays when it was first adopted.

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Budapest Convention on Cybercrime (2001)

The Budapest Convention on Cybercrime, 2001 is the Council of Europe treaty harmonising cybercrime laws and enabling cross-border evidence sharing. India has not signed it, objecting that it was drafted without developing-country participation and allows cross-border data access infringing sovereignty. It matters as the treaty India deliberately stays out of.

Example: The cybercrime treaty India declined over sovereignty concerns

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Buddha

The Buddha (563-483 BCE, traditional dates) was Siddhartha Gautama of the Shakya clan, born at Lumbini, who renounced palace life, attained enlightenment at Bodh Gaya, preached his first sermon at Sarnath, and attained mahaparinirvana at Kushinagar. His teaching rests on the Four Noble Truths and the Eightfold Path, with an emphasis on the Middle Way. He is the central figure of GS-1 ancient-history questions on heterodox sects.

Example: the Dhammacakkappavattana Sutta, his first sermon at Sarnath, which founded the Buddhist sangha

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Buddha's diagnosis

Buddha's diagnosis is the Buddhist account of suffering: dukkha arises from craving and attachment, and it ends when craving ends, as taught in the Four Noble Truths. It gives the essayist a complete causal theory of unhappiness, desire as the mechanism, and a practical method, the Eightfold Path, rather than mere consolation. It is the philosophical spine of every essay on wantlessness and contentment.

Example: The Buddha's Four Noble Truths, diagnosing craving as the cause of suffering.

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Buddhism

Buddhism is the religion and philosophy founded by Siddhartha Gautama, the Buddha, in the 6th century BCE, centred on the Four Noble Truths, the Eightfold Path and the rejection of ritual and caste hierarchy. It spread from its Gangetic heartland across Asia through missionary monks and royal patronage, especially Ashoka's. For UPSC, Buddhism is indispensable to ancient Indian history, art, architecture and the ethics syllabus.

Example: After the Kalinga war of 261 BCE, Ashoka embraced Buddhism and sent missions, including his children Mahinda and Sanghamitta, to Sri Lanka.

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Budget Division of the Department of Economic Affairs

The Budget Division is the arm of the Department of Economic Affairs in the Ministry of Finance that prepares the Union Budget. Working under the Finance Secretary, it compiles the Annual Financial Statement, the Demands for Grants and the Finance Bill from proposals received across ministries. For UPSC it is the institutional answer to how the budget is actually made, relevant to GS-2 and economy questions on the fiscal process and parliamentary financial control.

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Budget Estimates

Budget Estimates are the government's projections of receipts and expenditure for the coming financial year, presented in the Annual Financial Statement under Article 112 of the Constitution. They sit alongside the Revised Estimates for the current year and the actuals for the previous year, and Parliament votes the expenditure side through Demands for Grants. For UPSC, distinguishing Budget Estimates, Revised Estimates and actuals is a recurring Prelims trap in economy questions.

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Budhu Bhagat

Budhu Bhagat (1792-1832) was an Oraon tribal leader who led the Kol rebellion of 1831-32 in the Chotanagpur region against British revenue policies, zamindars and moneylenders. He organised guerrilla resistance by Kol, Munda and Oraon fighters against the loss of tribal lands and forced labour, before being killed by British forces at Silagai on 13 February 1832. For UPSC he represents the pre-1857 tribal uprisings that recur in Prelims history questions.

Example: The British announced a reward for his capture before storming Silagai village in February 1832.

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buffer state

A buffer state is a smaller country lying between two rival powers, reducing direct friction and conflict between them. Its neutrality or weakness is often maintained by mutual agreement of the stronger neighbours. It matters for UPSC because the concept explains British policy in Afghanistan during the Great Game with Russia, and it remains relevant to questions on India's neighbourhood, Nepal, and strategic geography.

Example: Afghanistan between British India and Tsarist Russia

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Buffer stock

Buffer stock is the government's reserve of wheat and rice, held by FCI, to meet PDS requirements, stabilise prices and handle emergencies. Norms fix quarterly minimum levels, split into operational stock and a strategic food-security reserve. For UPSC it is the physical guarantee behind food security and price management.

Example: FCI releasing buffer wheat through OMSS during a price spike shows the stock's stabilisation role.

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buffer stocks

Buffer stocks are the government's reserve holdings of foodgrains, maintained by the Food Corporation of India beyond immediate distribution needs. They stabilise prices and ensure food security during shortages or emergencies, and they underpin the Public Distribution System and the National Food Security Act. For UPSC, buffer stocks recur in prelims and GS-3 questions on food security, the Food Corporation, minimum support prices and open-market sales.

Example: Reserves of wheat and rice maintained by the Food Corporation of India form the bulk of India's buffer stocks.

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buffer zones

Buffer zones are the separation distances maintained between hazardous installations and residential areas to limit exposure in accidents.

Example: green-belt buffer zones around chemical plants absorb blast and toxic effects

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Build Back Better

Build Back Better is the principle that post-disaster reconstruction should improve resilience rather than merely restore the pre-disaster state. It is Priority 4 of the Sendai Framework and appears in India's NDMP.

Example: Odisha's cyclone shelters built after the 1999 super cyclone embody Build Back Better

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Build Back Better (BBB)

Build Back Better is the principle that post-disaster recovery and reconstruction should not merely restore what existed but improve resilience: safer buildings, better planning and reduced vulnerability. It is Priority 4 of the Sendai Framework.

Example: after the 2001 Bhuj earthquake, Gujarat rebuilt with strict seismic building codes, an instance of Build Back Better

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Build character

In UPSC ethics (GS-4), build character captures the idea that integrity in public life rests on cultivated moral character rather than mere rule-following. From Aristotle's habituation to Gandhi's emphasis on self-discipline, the tradition holds that character is formed by repeated right action, and civil services training invokes it to justify foundational values such as empathy, impartiality and dedication. It appears in ethics questions and case studies on moral development.

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build Dalit capital

This phrase refers to building economic capital among Dalits through entrepreneurship, asset ownership, credit access, and business networks, so that economic power complements political and social empowerment. It matters for UPSC because inclusive growth, social justice, and schemes for SC entrepreneurs are frequent GS-2 and GS-3 themes. It reflects the shift from welfare alone to enterprise-led empowerment.

Example: The Dalit Indian Chamber of Commerce and Industry (DICCI), founded in 2005 by Milind Kamble

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Building and Other Construction Workers Act, 2013

There is no enacted statute by this exact name, so the reference is best read as a misnomer. The operative laws are the Building and Other Construction Workers (Regulation of Employment and Conditions of Service) Act, 1996 and its companion Welfare Cess Act, 1996, which require registration of construction workers, welfare boards in every state, and a one per cent cess on construction cost to fund pensions, health cover and benefits. A 2013 Bill proposed amendments but was never enacted.

Example: State welfare boards use the cess fund to pay scholarships and maternity benefits.

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Building Materials and Technology Promotion Council

The Building Materials and Technology Promotion Council, under the Ministry of Housing and Urban Affairs, promotes disaster-resistant construction technologies and building materials.

Example: BMTPC's guidelines promote earthquake-resistant housing designs

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built

Built is used in history and archaeology for structures constructed by rulers, communities, or states, such as temples, forts, tanks, and cities. UPSC questions often ask who built what: the patron, dynasty, and period behind a monument. It matters for prelims because matching monuments to their builders, for example Pallava rock-cut temples or Mughal forts, is a recurring art-and-culture question type.

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built a shared political vocabulary

This phrase describes how the national movement forged a common political language, terms like swaraj, satyagraha, and swadeshi, understood across regions and languages. A shared vocabulary let diverse groups debate the same ideas and act together. It matters for UPSC because mains questions on nationalism often ask how Congress united a fragmented society, and the press, vernacular literature, and mass movements were the instruments.

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Bukka I (r. 1356–1379)

Bukka I, or Bukka Raya I, was the second emperor of Vijayanagara's Sangama dynasty, ruling from 1356 until his death in 1377. Succeeding his brother Harihara I, he consolidated the young empire, extended its control into the Tamil country through his son Kumara Kampana's campaigns, and patronised scholars including the commentator Sayana. For UPSC he is a staple of medieval South India questions on the rise and consolidation of the Vijayanagara Empire.

Example: His reign saw the Madurai Sultanate extinguished by Kumara Kampana's southern expedition.

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Bulk Waste Generator

A Bulk Waste Generator (BWG) is defined under the Solid Waste Management Rules, 2026 (notified by the Ministry of Environment, Forest and Climate Change, effective 1 April 2026) as an entity with a floor area of 20,000 square metres or more, water consumption of 40,000 litres per day or more, or solid waste generation of 100 kg per day or more. BWGs, estimated to produce about 30 percent of India's solid waste, must ensure their waste is processed in an environmentally sound manner or account for it through Extended Bulk Waste Generator Responsibility (EBWGR) certificates.

Example: The Municipal Corporation of Delhi identified 8,791 bulk waste generators, including hotels, hospitals, educational institutions and large residential societies, for monitoring under the new rules.

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Bulk Waste Generators

Under the Solid Waste Management Rules 2016, entities that generate more than 100 kilograms of waste per day, such as hotels, malls, housing societies and institutions. They must segregate waste at source and ensure its treatment on their own premises or in partnership with the urban local body, rather than dumping it into municipal collection. The category shifts part of the waste-management burden onto large generators.

Example: A large residential complex generating over 100 kg of waste daily must compost its wet waste on site under the 2016 Rules.

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Bulleh Shah's

Bulleh Shah (1680-1757) was a Punjabi Sufi poet of the Qadiri order whose kafis and dohas preached humanism, rejected religious orthodoxy and caste divisions, and celebrated divine love in the language of the people. His verses remain a living tradition in Punjab's folk music and Sufi shrines. For UPSC he represents the Bhakti-Sufi syncretic tradition asked in art-and-culture papers on medieval religious movements.

Example: His kafi Bullah Ki Jaana is still sung across Punjab on both sides of the border.

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Bundi

Bundi is a former Rajput princely state in south-eastern Rajasthan, ruled by the Hada Chauhan clan, and the town that served as its capital. It is famed for the Bundi school of miniature painting, noted for lush monsoon landscapes and Ragamala series, and for Taragarh Fort and its ornate stepwells. For UPSC it appears in art-and-culture questions on the Rajasthani schools of painting.

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Buranjis

The Buranjis are the historical chronicles of the Ahom kingdom of Assam, written first in the Tai-Ahom language and later in Assamese from Sukapha's arrival in 1228 to the early 19th century. Compiled by scribes under the Likhakar Barua from state papers, diplomatic correspondence and judicial records, they document politics, administration and society. They matter because they are among India's earliest prose chronicles and a core UPSC source for Assam history and medieval statecraft.

Example: first Buranji commissioned under Ahom king Sukapha (1228)

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Burden

In UPSC economics and governance, burden usually means the incidence of a cost, as in the tax burden, the debt burden, or the compliance burden on citizens and firms. Questions probe who actually bears a tax, the inter-generational burden of public debt, and how regulatory burden affects ease of doing business. It is a framing word that sharpens GS-3 economy and GS-2 governance answers.

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Burdwan, Midnapore and Chittagong

Burdwan, Midnapore and Chittagong were the three Bengal districts ceded to the East India Company by Mir Jafar in 1760 when he was restored to the Nawabship after Mir Qasim's removal. Their revenues gave the Company its first substantial territorial income stream in Bengal, a stepping stone to the Diwani of 1765. For UPSC the cession is a classic Prelims fact on the Company's early territorial foothold in India.

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Bureau of Immigration

The Bureau of Immigration is the Ministry of Home Affairs agency that controls immigration checkpoints, administers e-visas and visas on arrival, and runs the Foreigners Regional Registration Offices. It maintains the immigration database, enforces entry and exit rules, and coordinates deportations and lookout circulars. For UPSC it features in internal security and governance questions on border management, visa policy and foreigners' regulation.

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Bureau of Indian Standards

India's national standards body, functioning under the Ministry of Consumer Affairs, Food and Public Distribution and governed by the BIS Act 2016. It formulates Indian Standards, runs product certification through the ISI mark, hallmarking of gold jewellery and registration of electronics, and represents India in the ISO and IEC. Its standards underpin quality, safety and consumer protection across the economy.

Example: The ISI mark on packaged drinking water or cement certifies conformity to a Bureau of Indian Standards specification.

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Bureaucratic attitude

In UPSC GS-4 and governance answers, bureaucratic attitude denotes the work culture of the civil services, spanning Weberian virtues of rule-bound impartiality and the colonial legacy of aloofness, red tape and status consciousness. Reform debates from the Administrative Reforms Commission reports to Mission Karmayogi target precisely this attitude, urging a shift from procedure to outcomes. It is a standard theme in ethics and governance questions.

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buried

Buried describes archaeological remains covered over time by silt, sand, or later construction, preserving cities, inscriptions, and artifacts until excavation. Burial explains why sites like Harappan settlements survived for millennia. It matters for UPSC because prelims questions on archaeology, stratigraphy, and site discovery assume an understanding of how material evidence gets buried and recovered.

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Burma was separated

Burma was separated from British India in 1937 under the Government of India Act, 1935, becoming a separately administered colony with its own legislature and governor. The separation followed the Simon Commission's recommendations and Burmese nationalist demands, though Burma remained under the India Office in London. For UPSC it is a standard Prelims fact on the territorial changes effected by the 1935 Act.

Example: The separation took effect on 1 April 1937.

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Burnpur

Burnpur is the steel town in West Bengal's Asansol region that hosts the IISCO Steel Plant, now part of the Steel Authority of India. Developed in the early twentieth century around the Indian Iron and Steel Company, it became one of independent India's major public-sector steel centres after IISCO's nationalisation. For UPSC it illustrates industrial geography and the story of public-sector steel in India's planned development.

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Business Advisory Committee

The Business Advisory Committee is a parliamentary committee in each House that regulates the programme and timetable of legislative business. Chaired by the Speaker in the Lok Sabha and by the Chairman in the Rajya Sabha, it recommends how much time should be allotted to government bills and other business and the order in which items are taken up. It is the key instrument of legislative time management and a standard UPSC topic on parliamentary procedure.

Example: The committee fixes the time allotted for discussion on the demands for grants in the Union Budget.

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Business Responsibility and Sustainability Reporting

Business Responsibility and Sustainability Reporting is SEBI's ESG disclosure framework requiring the top 1,000 listed companies by market capitalisation to report on environmental, social and governance parameters. Introduced in 2021 to replace the earlier Business Responsibility Reports, it standardises disclosures on emissions, workforce diversity and value-chain responsibility. For UPSC it links corporate governance, India's climate commitments and securities regulation in economy and environment answers.

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business-official nexus

The business-official nexus is the collusive relationship between private business interests and public officials, in which policy, licences or contracts are traded for bribes, favours or post-retirement rewards. It produces cronyism and regulatory capture, distorting markets and governance alike. For UPSC, it is a core GS-4 ethics concept, invoked in answers on corruption, conflict of interest and the need for transparent procurement and cooling-off norms.

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Business4Land

A UNCCD initiative launched at its COP16 in Riyadh in 2024 to draw private-sector capital and corporate action into sustainable land and water management. It responds to the large finance gap for land restoration and Land Degradation Neutrality by engaging businesses as restoration partners. For UPSC it illustrates the push for private finance in desertification control.

Example: Business4Land was launched at UNCCD COP16 in Riyadh to mobilise corporate investment in land restoration.

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But the Act

This is a sentence fragment captured during text extraction and is not a key term. It carries no definitional content and appears here only because the words were highlighted in a source passage. Readers should ignore this entry and refer to the article's own discussion of the relevant statute, whose proper name carries a full definition elsewhere in this glossary.

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Buy (Indian-Indigenously Designed, Developed and Manufactured)

Buy (Indian-Indigenously Designed, Developed and Manufactured) is the top-priority procurement category under DAP 2020 for equipment indigenously designed, developed and manufactured, with at least 50 per cent indigenous content. It matters because it channels defence spending to domestic design, not just domestic assembly.

Example: Fighter and missile programmes procured under Buy (Indian-IDDM)

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Buy-Now-Pay-Later

Buy-Now-Pay-Later is a short-term credit product that lets consumers split purchases into interest-free instalments, typically offered by fintech firms at online checkout. Its rapid growth and reports of hidden charges prompted the Reserve Bank's 2022 digital lending guidelines to strengthen borrower protection and transparency. For UPSC it is a current-affairs economy topic on fintech regulation, consumer credit and financial inclusion.

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