Sardar Vallabhbhai Patel was the first Home Minister of India from 2 September 1946 to 15 December 1950. He was called the "Iron Man of India", and was often addressed as "Sardar" which means "Chief" or "Leader" in many languages of India
Who was the first female prime minister of the Republic of India, who served for three consecutive terms from 1966 to 1977 and then from 1980 until her assassination in 1984?