21.
The answer is: B
Explanation
The correct option is B: Mrs. Meira Kumar.
Mrs. Meira Kumar's father, Babu Jagjivan Ram, served as the Deputy Prime Minister of India. Babu Jagjivan Ram was a prominent leader in Indian politics and held various important positions in the government, including Deputy Prime Minister, Minister of Defence, and Minister of Labour and Rehabilitation, among others. Therefore, option B is the correct choice, as it identifies the leader whose father was the Deputy Prime Minister of India.