The correct answer is A. Jayaprakash Narayan.
Bihar Socialist Party was formally inaugurated by Jayaprakash Narayan on 11 October 1952. The party was formed by a merger of the Socialist Party and the Kisan Mazdoor Praja Party. The party’s main objective was to fight for the rights of the poor and the oppressed.
M. N. Roy was a Bengali Indian revolutionary, politician, and socialist. He was one of the founding members of the Indian National Congress and the Communist Party of India. He later left the Communist Party and founded the Radical Democratic Party.
Subhash Chandra Bose was an Indian nationalist who was one of the most prominent leaders of the Indian independence movement. He was the founder of the Indian National Army and the All India Forward Bloc.
Satya Bhagat was an Indian independence activist who was a member of the Indian National Congress. He was one of the leaders of the Quit India Movement.