The correct answer is B. R. Ambedkar. Mahad Satyagraha or Chavdar Tale SatyagrahaIt was a satyagraha led by B. R. Ambedkar on 20 March 1927 to allow untouchables to use water in a public tank in Mahad (currently in Raigad district), Maharashtra, India. Hence, Option 1 is correct. The day (20 March) is observed as Social Empowerment day in India. In 1927, Ambedkar decided to launch a satyagraha (nonviolent resistance) to assert their right to use water in public places. Mahad, a town in Konkan, was selected for the event because it had a nucleus of support from ‚¬Ëœcaste Hindus. Important PointsDr. B. R. AmbedkarB. R. Ambedkar was appointed as the first Law Minister of Independent India in 1947B. R. Ambedkar is popularly known as 'Babasaheb' on 14th April 1891 in Indore city in Madhya Pradesh. He was the great leader of the depressed class and an eminent jurist. He is known as the chief architect of the Indian Constitution and the father of the Indian Constitution. He became the Chairman of the Drafting Committee. Ambedkar considered the Right to Constitutional Remedy as the "Soul of the Indian Constitution". Additional InformationMahatma GandhiGandhiji is known as the Father of our Nation. He returned to India from South Africa on 9th January 1915 and celebrated it as Pravasi Bharatiya Divas (NRI Day). The first satyagraha of Gandhiji is Chamapran Satyagraha (1917) also known as the first civil disobedience movement. The first hunger strike of Gandhiji is Ahmedabad Mill Strike (1918). The first non-cooperation movement of Gandhiji is Kheda Satyagraha (1918). He was the president of the INC session in Belgaum (1924). In 1931, Gandhiji participated in the Second Round Table Conference in London. Gandhiji was assassinated on 30 January 1948 by Nathuram Godse and observed as 'Martyrs Day'. Subhas Chandra BoseHe was born on 23rd January 1897, in Cuttack, Orissa Division, Bengal Province, to Prabhavati Dutt Bose and Janakinath Bose. His Jayanti is celebrated as 'Parakram Diwas' on 23rd January. In 1919, he had cleared the Indian Civil Services (ICS) examination. Bose, however, resigned later. He was highly influenced by Vivekananda's teachings and considered him his spiritual Guru. His political mentor was Chittaranjan Das. He worked as the editor for Das‚¬„¢s newspaper‚¬€œForward and later started his own newspaper, Swaraj. Bal Gangadhar Tilak He was born on 23rd July 1856 in Ratnagiri, Maharashtra. Freedom fighter and lawyer, Bal Gangadhar Tilak, is also known as Lokmanya Tilak. Founder of the Deccan Education Society (1884) along with his associate Gopal Ganesh Agarkar and others. One of the founders of the Fergusson College (1885) in Pune through the Deccan Education Society. He gave the slogan ‚¬Å“Swaraj is my birthright and I shall have it!‚¬