Who was known as the 'Iron Man of India'?

Correct option is A

Sol. Sardar Vallabhbhai Patel is known as the 'Iron Man of India.'
 VallabhbhaiJhaverbhai Patel was born in Nadiad, Gujarat on 31 October, 1875.
 He acted as Home Minister during the political integration of India and the Indo-Pakistani War of 1947. He also served as the first Deputy Prime Minister of India.
 Under the chairmanship of Sardar Patel, “Fundamental Rights and Economic Policy” resolution was passed by the Congress in 1931.
 After suffering a massive heart attack (his second), Patel died on 15 December, 1950, at Birla House in Bombay.