Correct option is C
The correct answer is: (C) Dr. Bhimrao Ramji Ambedkar
Dr. Bhimrao Ramji Ambedkar, a prominent social reformer, jurist, and the principal architect of the Indian Constitution, founded the Independent Labour Party (ILP) in 1936 to represent the interests of the working class and to fight for the rights of the untouchables and other marginalized groups.
Later, he also formed the Scheduled Castes Federation in 1942, focusing on the political rights and empowerment of the Scheduled Castes. Ambedkar's contributions were pivotal in the fight against caste discrimination and for the upliftment of Dalits in India.