Detailed explanation and options for the selected question.
M.N. Roy was the first person to propose the idea of a Constituent Assembly for India. Option "Jawaharlal Nehru" played an important role later but did not propose the idea first. Option "Subhas Chandra Bose" was focused on the Indian National Army and independence but did not propose the Constituent Assembly idea. Option "Sardar Patel" played a major role but not in the proposal of the Assembly.