The correct answer is J. B. Kripalani.The first meeting of the Constituent Assembly of India took place in Constitution Hall, New Delhi, on Monday, the 9th of December 1946. at Eleven of the Clock.The Muslim League boycotted the meeting and insisted on a separate state of Pakistan.The meeting was thus attended by only 211 members.J. B. Kripalani proposed the name of Dr. Sacchidanand Sinha for the post of provisional president of the Constituent Assembly.Later, Dr. Rajendra Prasad was elected as the President of the Assembly.Similarly, both H.C. Mukherjee and V.T. Krishnamachari were elected as the Vice-Presidents of the Assembly.