Question: Siddhartha Bhattacharya is a member of a political party with close links to what Hindu nationalist?

full_context: Document 1: Hindutva: Hindutva ("Hinduness"), a term popularised by Vinayak Damodar Savarkar in 1923, is the predominant form of Hindu nationalism in India. The Bharatiya Janata Party (BJP) adopted it as its official ideology in 1989. It is championed by the Hindu nationalist volunteer organisation Rashtriya Swayamsevak Sangh (RSS) and its affiliate organisations, notably the Vishva Hindu Parishad.
Document 2: Siddhartha Bhattacharya: Siddhartha Bhattacharya is an Assamese Politician from the state of Assam. He is a member of the Assam Legislative Assembly from Bharatiya Janata Party. He had joined Bharatiya Janata Party in 1995 and was party President of Assam unit in 2014 but was replaced by Sarbananda Sonowal ahead of Assam Legislative Assembly election, 2016.
Document 3: Rajnath Singh: Rajnath Ram Badan Singh (born 10 July 1951) is an Indian politician belonging to the Bharatiya Janata Party (BJP) who currently serves as the Home Minister. He previously served as the Chief Minister of Uttar Pradesh and as a Cabinet Minister in the Vajpayee Government. He has also served as the President of the BJP twice, 2005 to 2009 and 2013 to 2014. He began his career as a physics lecturer and used his long-term association with the Rashtriya Swayamsevak Sangh (RSS) to become involved with the Janata Party.
Document 4: Akhil Bharatiya Hindu Mahasabha: The Akhil Bhāratiya Hindū Mahāsabhā (translation: "All-India Hindu Grand-Assembly") is a right wing Hindu nationalist political party in India.
Document 5: Ganga Bhakt Singh: Ganga Bhakt Singh (1922–2010) was a senior leader of Bharatiya Janata Party from Uttar Pradesh, India, who had connections to the Rashtriya Swayamsevak Sangh. He served as a cabinet minister twice in the Government of Uttar Pradesh in 1967 and 1991 and as the Deputy-Chairman of the State Planning Commission between 1999-2002 under the Chief Minister Rajnath Singh. He was a member of the Sixth Lok Sabha from Shahabad Lok Sabha constituency as well as being a member of the Uttar Pradesh Legislative Assembly for four terms.
Document 6: Vibhuti Bhushan Sharma: Dr.Vibhuti Bhushan Sharma was the youngest president elected in the history of Rajasthan High Court Bar Association, Jaipur, elected in March 2012. He was also elected General Secretary of the same Association in the year 2007–2008. Dr. Sharma is also Government Counsel for Government of Rajasthan thus represents State Government before Rajasthan High Court. The Indian National Congress, apparently in Election Mode 2014 has recently appointed Vibhuti Bhushan Sharma a member of the important committee to monitor implementation of Election Manifesto 2009. Dr.Vibhuti Bhushan Sharma has been appointed as member of the Congress Manifesto Committee constituted by AICC (All India Congress Committee) for the upcoming Assembly Elections 2013 in the state of Rajasthan. He has also worked as member of the Congress Manifesto Committee in Assembly Elections 2008. He is M.A. in Public Administration from University of Rajasthan at Jaipur, Ph.D. in Total Quality Education, LL.B, and Bachelor in Journalism and Mass Communication. His father Late Mr. Radhey Shyam Sharma, who worked in the Rajasthan Administrative Services, translated many religious books in English Verse to Sanskrit, like Shri Mad Bhagwad Gita, Shri Durga Saptshati, Shri Ram Charit Manas, Ram Gita, Ashtavakra Gita, Shiv Mahiman Strota, Shiv Tandav Stotra and a Dictionary Vishva Mithak Kosh (written in Hindi on mythological characters).
Document 7: S. P. Singh Baghel: Prof S.P. Singh Baghel is the cabinet minister from BJP in the UP government. He was a former Lok Sabha member and Rajya Sabha member. But he lost most of his ground by losing three consecutive Lok Sabha elections before winning an MLA election in 2017 and becoming the cabinet minister. He was elected to the Lok Sabha when he was in the Samjwadi party. After completing three terms in Lok Sabha from Samjwadi party, he was suspended from the party after which he joined BSP from where he contested two Lok Sabha elections but lost both of them. Then he was given a chance to join Rajya Sabha in 2014, but lost again to Bhartiya Janta Party. On 3 July 2015, S.P. Singh Baghel was made President of BJP OBC Morcha.
Document 8: Akhil Bharatiya Vidyarthi Parishad: Akhil Bharatiya Vidyarthi Parishad (ABVP) (Sanskrit: अखिल भारतीय विद्यार्थी परिषद, "All Indian Student Council") is a Hindu nationalist all India student organisation affiliated to the Hindu nationalist Rashtriya Swayamsevak Sangh (RSS).It is one of the largest student organisations internationally, with more than three million members.
Document 9: Bharatiya Janata Party: The Bharatiya Janata Party (] ; translation: Indian People's Party; BJP) is one of the two major political parties in India, along with the Indian National Congress. s of 2016 , it is the country's largest political party in terms of representation in the national parliament and state assemblies, and it is the world's largest party in terms of primary membership. The BJP is a right-wing party, with close ideological and organisational links to the Hindu nationalist Rashtriya Swayamsevak Sangh.
Document 10: Narhari Amin: Narhari Amin (born 5 June 1955) is a politician from Gujarat state of India. He is a member of Bharatiya Janta Party. Formerly he was affiliated Indian National Congress. He left the Indian National Congress on 5 December 2012 after he was denied a ticket to contest the December 2012 Legislative polls. On December 6, 2012, he joined the Bharatiya Janata Party in the presence of Narendra Modi. On the 29th of October 2013 he was made the vice president of the planning commission of Gujarat which is headed by Narendra Modi himself being its president.
Document 11: Indian National Congress: The Indian National Congress (   ) (INC, often called Congress) is a broad-based political party in India. Founded in 1885, it was the first modern nationalist movement to emerge in the British Empire in Asia and Africa. From the late 19th-century, and especially after 1920, under the leadership of Mahatma Gandhi, Congress became the principal leader of the Indian independence movement, with over 15 million members and over 70 million participants. The Congress led India to independence from Great Britain, and powerfully influenced other anti-colonial nationalist movements in the British Empire.
Document 12: National Democratic Alliance (India): The National Democratic Alliance (NDA) is a centre-right coalition of political parties in India. At the time of its formation in 1998, it was led by the Bharatiya Janata Party (BJP) and had thirteen constituent parties. Its honorary chairman is former Prime Minister Atal Bihari Vajpayee. Also representing the alliance are L. K. Advani, former Deputy Prime Minister, who is the acting chairman of the Alliance, Narendra Modi, current Prime Minister and Leader of the House in Lok Sabha; and Arun Jaitley, Leader of the House in Rajya Sabha. The coalition was in power from 1998 to 2004. The alliance returned to power in the 2014 General election with a combined vote share of 38.5%. Its leader, Narendra Modi, was sworn in as Prime Minister of India on 26 May 2014.
Document 13: Hindu Prajatantrik Party: Hindu Prajatantrik Party is the Hindu nationalist political party in Nepal. The goal of this party is to strive to establish Nepal as a Hindu republic.
Document 14: Abba Siddick: Abba Siddick is a Muslim Chadian politician and revolutionary born in what was the Oubangui-Chari French colony (today Central African Republic). In passing in Chad (also a French colony then), he entered in active politics in the Chadian Progressive Party (PPT), a nationalist and radical African political party founded in 1947 and led by Gabriel Lisette. By 1958, he had left the PPT to form with others the Chadian National Union (UNT), a Muslim progressive party, but he turned quite early to the PPT and, after the independence of Chad, was minister of Education of the President François Tombalbaye. However the President's discrimination against Muslims in Chad brought him to become a member of the rebel insurgent group FROLINAT, formed in 1966 to oppose the rule of Tombalbaye. After the death of the organization's first secretary-general in 1968, a vicious battle for leadership ensued, which terminated with the victory of Siddick in 1969, even though he was perceived as an Anti-Arab and was suspected of being a moderate leftist and not having any revolutionary apprentiship. He made Tripoli the headquarters of the front; and Libya took the place of Sudan as key supplier of the FROLINAT. While he was internationally recognized as the head of the FROLINAT, he was losing control of the units on the ground. In 1971 he tried to reassert his authority by proposing to unify the insurgent forces active in Chad, but Goukouni Oueddei, head of the Second Liberation Army of the FROLINAT, broke with Siddick, who managed to at least keep a loose control over the First Liberation Army.
Document 15: Amra Bangali: Amra Bangali" (AMB) (Bengali: আমরা বাঙালী"' ; translation: "We are Bengalis") is a radical Bengali political party in India. Founded by renowned philosopher Prabhat Ranjan Sarkar; the party was sparked off in reaction against anti-Bengali rhetoric in Indian politics that characterised Bengalis as infiltrators in Northeast India. Amra Bangali enjoyed a short stint in the spotlight in the mid-eighties when it even won some gram panchayat seats in border districts. Today, AMB is involved in various movements and protests including those against the Darjeeling Gorkhas calling for the creation of new state of Gorkhaland.
ground_truth: Rashtriya Swayamsevak Sangh