The correct answer is Dr. Rajendra Prasad. Explanation & Key Takeaways: • The Union Constituent Assembly appointed a number of committees to deal with different tasks of constitution-making. • Out of these, eight were major committees and the others were minor committees. • The names of the major committees and their chairmen are given below : • Union Powers Committee – Jawaharlal Nehru • Union Constitution Committee – Jawaharlal Nehru • Provincial Constitution Committee – Sardar Patel • Drafting Committee – Dr B.R. Ambedkar • Advisory Committee on Fundamental Rights, Minorities and Tribal and Excluded Areas – Sardar Patel. • Rules of Procedure Committee – Dr Rajendra Prasad • States Committee (Committee for Negotiating with States) – Jawaharlal Nehru • Steering Committee – Dr Rajendra Prasad Important Notes: • Drafting Committee of Constituent Assembly- • Chairman – Dr BR Ambedkar • Members • N Gopalaswamy Ayyangar • Muhammad Saadullah • Alladi Krishnaswami Ayyar • KM Munshi • BL Mittar substituted by N Madhava Rao following his resignation on health issues • Dr DP Khaitan (died in 1948 and was substituted by TT Krishnamachari)