The ‘Iron Man of India,’ who unified the princely states:

Sardar Vallabhbhai Patel
Jawaharlal Nehru
B.R. Ambedkar
Mahatma Gandhi

The correct answer is Sardar Vallabhbhai Patel. He was the first Deputy Prime Minister of India and the Home Minister of India. He is also known as the “Iron Man of India” for his role in uniting the princely states into the Indian Union.

Jawaharlal Nehru was the first Prime Minister of India. He was a leader of the Indian National Congress and a close associate of Mahatma Gandhi.

B.R. Ambedkar was a Dalit leader, jurist, economist, politician, and social reformer who played a leading role in the drafting of the Constitution of India.

Mahatma Gandhi was the leader of the Indian independence movement against British rule. He employed nonviolent civil disobedience as a means to achieve his goals.