The correct answer is M. N. Roy. Explanation & Key Takeaways: • Background of Constituent Assembly: • It was in 1934 that the idea of a Constituent Assembly for India was put forward for the first time by M. N. Roy, a pioneer of the communist movement in India. • In 1935, the Indian National Congress (INC), for the first time, officially demanded a Constituent Assembly to frame the Constitution of India. • In 1938, Jawaharlal Nehru, on behalf of the INC declared that ‘the Constitution of free India must be framed, without outside interference, by a • Constituent Assembly elected on the basis of the adult franchise’. • The demand was finally accepted in principle by the British Government in what is known as the ‘August Offer’ of 1940. In 1942, Sir Stafford Cripps, a member of the cabinet, came to India with a draft proposal of the British Government on the framing of an independent Constitution to be adopted after World War II. • The Cripps Proposals were rejected by the Muslim League which wanted India to be divided into two autonomous states with two separate Constituent Assemblies. • Finally, a Cabinet Mission was sent to India. • While it rejected the idea of two Constituent Assemblies, it put forth a scheme for the Constituent Assembly which more or less satisfied the Muslim League.