The correct answer is (a), Rajendra Prasad.
Rajendra Prasad was the President of the Indian National Congress from 1934 to 1936, 1939 to 1946, and 1947 to 1950. He was also the first President of India from 1950 to 1962.
Jawaharlal Nehru was the Prime Minister of India from 1947 to 1964. He was the first Prime Minister of India and is considered to be the architect of modern India.
J. B. Kripalani was the President of the Indian National Congress from 1946 to 1947. He was a Gandhian and a freedom fighter.
Sardar Patel was the Deputy Prime Minister of India from 1947 to 1950. He is considered to be the Iron Man of India for his role in the integration of the princely states into the Indian Union.