The Drafting Committee of the Indian Constitution was a committee responsible for drafting the constitution of India. The correct answer is option 3, Rajendra Prasad, as he was not a member of the Drafting Committee.

Option 1, B. R. Ambedkar, was the chairman of the Drafting Committee and played a crucial role in drafting the constitution. Option 2, Alladi Krishnaswamy, was also a member of the Drafting Committee and made significant contributions to the constitution. Option 4, GopalachariAyyangar, was another member of the Drafting Committee and played an important role in shaping the Indian constitution.

It is important to note that Rajendra Prasad played a different role in the constitutional process as the President of the Constituent Assembly of India.