Question: What is the main ethnic group of the Indian state where the Centre for Studies in Social Sciences, Calcutta is located?

Context paragraphs:
West Bengal: West Bengal ( ) is an Indian state located in Eastern India on the Bay of Bengal.  It is India's fourth most populous state, with over 91million inhabitants (as of 2011).  It has an area of 88752 km2 .  A part of the ethno-linguistic Bengal region, it is bordered by Bangladesh in the east, and Nepal and Bhutan in the north; it shares borders with five Indian states: Odisha, Jharkhand, Bihar, Sikkim, and Assam.  The state capital is Kolkata (Calcutta), the seventh-largest city in India.  As for geography, West Bengal includes the Darjeeling Himalayan hill region, the Ganges delta, the Rarh region, and the coastal Sundarbans.  The main ethnic group are the Bengalis, with Bengali Hindus forming the demographic majority.

Tripuri Kshatriya: Tripuri Kshatriya is a Vaishnav caste group which encompasses almost all the members of the Tripuri, Reang, Jamatia and Noatia ethnic groups, most of whom live in the Indian state of Tripura.  The Tripuri Royal Family belonged to the Tripuri ethnic group, from the Deb Barma clan.  Originally the term "Tripur Kshatriya" was used to denote the Tripuri ethnic group only, but in due time, the Maharajah included the remaining three ethnic groups as well, in an attempt to foster a sense of kinship among his people.  With the influx of the Bengali immigrants from neighbouring places, the Tripuris lost their majority in their own kingdom and the Maharajah's power was taken away by the Indian government.  Formerly, the community was organized under the Tripura Kshatriya Samaj, which was headed by the Maharajah of Tripura himself.

Gautam Bhadra: Gautam Bhadra is a historian of South Asia and was a member of the erstwhile Subaltern Studies collective.  Bhadra was born in Kolkata in 1948.  He obtained education at Presidency College, Jadavpur University and Jawaharlal Nehru University.  He started teaching at the Department of History, University of Calcutta and continued there for more than 15 years.  After that, he became the professor of history at Centre for Studies in Social Sciences, Calcutta (1996-2010).  He was the first Tagore National Fellow and based at the National Library in Kolkata.  Currently he is Honorary Professor at the Centre for Studies in Social Sciences (Jadunath Bhavan Museum and Resource Centre).

Languages of Malaysia: The indigenous languages of Malaysia belong to the Mon-Khmer and Malayo-Polynesian families.  The national, or official, language is Malay which is the mother tongue of the majority Malay ethnic group, however English may take preference in many settings and is spoken by the majority of the population.  The main ethnic groups within Malaysia comprise the Malays, Chinese and Indians, with many other ethnic groups represented in smaller numbers, each with its own languages.  The largest native languages spoken in East Malaysia are the Iban, Dusunic, and the Kadazan languages.  English is widely understood and spoken in service industries and is a compulsory subject in primary and secondary school.  It is also the main language spoken in most private colleges and universities.  English may take precedence over Malay in certain official contexts as provided for by the National Language Act, especially in the states of Sabah and Sarawak, where it may be the official working language.

Tata Institute of Social Sciences: The Tata Institute of Social Sciences (TISS) is a social sciences institute with its main campus based in Mumbai, India.  Since its establishment in 1936, it has been one of the premier institutes in India in social sciences, human development, public policy and economics.  The institute is a part of an elite group of research and higher learning institutes with early support from the Tata Trusts in India.  Other institutes in this group include Indian Institute of Sciences (IISc) and Tata Institute of Fundamental Research (TIFR).

Michel Boivin: Michel Boivin is a French historian and anthropologist who specializes in the Muslim world.  Trained in contemporary history, Islamic studies and ethnology, he is currently Senior Research Fellow at the Centre national de la recherche scientifique (CNRS: French National Center for Scientific Research) and a member of the CEIAS (Center for South Asian Studies) at the School for Advanced Studies in the Social Sciences (EHESS).  He teaches at the EHESS, where he supervises Masters and Ph.D. students.  He also gives courses on contemporary constructions of secularism in Europe and in the Muslim world at the Université de Savoie Mont Blanc, and on the historical anthropology of South Asia at Sciences Po Lyon.  In 2011, he created the Centre for Social Sciences in Karachi (CSSK), which is hosted by the Alliance Française in Karachi, as well as a collection published by Oxford University Press in Pakistan, the "CSSK Series."  Since 2013, he has been co-directing two seminars at the EHESS: “History and Anthropology of the Muslim Societies of South Asia” and “Authority and Politics in the Sufism of South and Central Asia.”  In addition, he contributes to the organization of two CEIAS research groups: “Vernacular Cultures and New Muslim Elites,” with Julien Levesque, and “Gujarati and Sindhi Studies: Societies, Languages and Cultures,” with Pierre Lachaier.

Centre for Studies in Social Sciences, Calcutta: Centre for Studies in Social Sciences, Calcutta (CSSSC) is a social science and humanities research and teaching institute in Kolkata, West Bengal, India.  Established in 1973 in works within the purview of Indian Council of Social Science Research and funded by the same council and Government of West Bengal.  It is one of the top institute in social sciences in India.  The centre was founded when Professor S. Nurul Hasan was the education minister of India.  Barun De was appointed as its first Director.

Social Scientist: Social Scientist is a New Delhi-based journal published by the Indian School of Social Sciences and Tulika Books in the areas of social sciences and humanities.  The journal has been running since 1972 and is edited by the JNU social scientist Prabhat Patnaik.  The Managing Editor is Rajendra Prasad.  The journal is indexed in the International Bibliography of Social Sciences and the Bibliography of Asian Studies.

Sugata Marjit: Sugata Marjit is the former Vice Chancellor of the University of Calcutta and Reserve Bank of India Professor of Industrial Economics at the Centre for Studies in Social Sciences, Calcutta and the Project Director of Centre for Training & Research in Public Finance and Policy (CTRPFP) [A Ministry of Finance, Government of India funded initiative].  He is a Ph.D. at the University of Rochester and currently the Editor of South Asian Journal of Macroeconomics and Public Finance.  He used to be the Director of Centre for Studies in Social Sciences, Calcutta from March 2007 to March 2012.  On 15 July, 2015 he took the charge as an interim Vice-Chancellor of the prestigious University of Calcutta, Kolkata, India.

Elections in Bosnia and Herzegovina: At state level, Bosnia and Herzegovina votes for the rotating Presidency of Bosnia and Herzegovina and the Parliamentary Assembly.  The members of the presidency are elected for a four-year term by constituencies referring to the three main ethnic groups.  The candidate with the most votes in a constituency is elected.  The Parliamentary Assembly ("Parlamentarna Skupština") has two chambers.  The House of Representatives ("Predstavnički dom/Zastupnički dom") has 42 members, elected for a four-year term by proportional representation in each main ethnic group.  The House of Peoples ("Dom Naroda") has 15 members, appointed by the parliaments of the two Entities.  Bosnia and Herzegovina has a multi-party system, with numerous political parties in which no one party has a chance of gaining power alone, and parties must work with each other to form coalition governments. Each main ethnic group has its own dominant political party.

Supporting paragraphs: Centre for Studies in Social Sciences, Calcutta West Bengal
Answer: the Bengalis