Who among the following was the first Chairman of the Constituent Assembly in India?

The correct choice is: “Dr. Sachchidananda Sinha”

At the first meeting of the Constituent Assembly on 9 December 1946, Dr. Sachchidananda Sinha, the oldest member, presided as its temporary Chairman, following the French practice. On 11 December 1946, Dr. Rajendra Prasad was elected its permanent President.

Harendra Coomar Mookerjee was the Vice-President of the Assembly, and Dr. B.R. Ambedkar was the Chairman of its Drafting Committee.