Mohammad Hidayatullah (20 July 1969-24 August 1969): He served as the acting President for little over a month after V V Giri's resignation. Hidayatullah was a teacher, scholar and linguist. Later in life he also became the Chief Justice of India. In the image: Jayakanthan, a writer, being awarded the Soviet Land Nehru Award in 1979 by the then Vice President M Hidayatullah. ( File Photo| EPS)