Which one of the following leader played a vital role in the integration of princely states with India?

Sardar Vallabhbhai Patel

Sardar Vallabhbhai Patel played an important role in the integration of princely states with India.

He was a leader of the freedom movement & a Congress leader from Gujarat.
He was a follower of Mahatma Gandhi and participated in various movements with him.
He was the Deputy Prime Minister and first Home Minister of independent India.
Also, he was a member of important committees of the Constituent Assembly on Fundamental Rights, Minorities, Provincial Constitution, etc.