Explanation
Dr. Rajendra Prasad was the President of the Constituent Assembly of India, therefore the correct answer is A: Babu Rajendra Prasad.
Dr. Rajendra Prasad was a prominent Indian nationalist and a key figure in the Indian independence movement. He was a close associate of Mahatma Gandhi and played an important role in the non-cooperation movement and the civil disobedience movement against British colonial rule in India.
After India gained independence, Dr. Rajendra Prasad was elected as the President of the Constituent Assembly of India. He presided over the assembly's proceedings, and his leadership and guidance were instrumental in the drafting of the Indian Constitution.
Dr. Rajendra Prasad went on to become the first President of independent India, serving two terms from 1950 to 1962. He played a key role in shaping India's democratic institutions and promoting the country's development and progress. He remains a revered figure in Indian history and is widely regarded as one of the founding fathers of modern India.