Solution:

• M.N Roy, a pioneer of the communist movement in India and an advocate of radical Democracy was the person who for the first time in 1934 put forth the Idea an Indian Constituent Assembly for framing of Constitution of India for and according to Indians.

• The Constitution of India is the supreme law of India.The document lays down the framework that demarcates fundamental political code, structure, procedures, powers, and duties of government institutions and sets out fundamental rights, directive principles, and the duties of citizens.

• It is the longest written constitution of any country on Earth.