How was Dr. B. R. Ambedkar chosen as the leader of the constituent assembly drafting the constitution of India? What is the story?

His credibility. He was great economist, statesman, philosopher, anthropligist, Jurist, Historians, and many more intellectual feathers in his cap. His great work in various 19 subcommittees influenced congress leadership.

His mini Constitution draft “States and Minorities" shows path towards making of great constitution of India.

He was good friend to Winston Churchil, and had great reputation with his colleagues in London University. His ideas about secularism,and his basic thoughtline was having great principles Equality, Fraternity and social Justice.

He advocates for New India which was based on scientific developement of strong India.

Hence was fully deserves to be architect of Indian Constitution.