Concept:
• The drafting of the Indian Constitution was managed through various specialized committees of the Constituent Assembly.
• Match each committee to the prominent nationalist leader who chaired it.
Step 1: Match based on the role of the Assembly President
Dr. Rajendra Prasad was the President of the Constituent Assembly.
He chaired committees related to the internal administration and governance of the house, such as the Rules of Procedures Committee and the Steering Committee.
Thus, a matches with iv.
Step 2: Match based on Central and Provincial executive roles
Jawaharlal Nehru, the first Prime Minister, led committees related to the power of the Union (Central government).
Thus, the Union Power Committee matches with iii.
Sardar Vallabhbhai Patel, the first Home Minister, led the committee focusing on the provinces.
Thus, the Provincial Constitution Committee matches with ii.
Step 3: Match the remaining special committee
The Ad-hoc Committee on the National Flag (often simply referred to as the Flag Committee in competitive exams) was chaired by J.B. Kripalani (though some historical records cite Dr. Rajendra Prasad for the formal ad-hoc committee, in the context of these standard options, i is the intended match for d).