Option 1: Sardar Vallabhbhai Patel was not the Chairman of the Union Powers Committee of the Constituent Assembly of India. He played a significant role in the integration of princely states into the newly independent India and was the first Deputy Prime Minister and Minister of Home Affairs.

Option 2: Dr. B.R. Ambedkar was not the Chairman of the Union Powers Committee of the Constituent Assembly of India. He was the Chairman of the Drafting Committee and played a pivotal role in the drafting of the Indian Constitution.

Option 3: Sir Alladi Krishnaswami Ayyar was not the Chairman of the Union Powers Committee of the Constituent Assembly of India. He was a prominent lawyer and member of the Constituent Assembly, but his role was not related to the committee in question.

Option 4: Pt. Jawaharlal Nehru was indeed the Chairman of the Union Powers Committee of the Constituent Assembly of India. He also served as the first Prime Minister of independent India.