A. March 01, 1979
B. April 01, 1979
C. February 01, 1979
D. None of these
Submitted by: Syed Nizakat Ali Shah
Iran voted by national referendum to become an Islamic republic on 1 April 1979 and to formulate and approve a new theocratic-republican constitution whereby Khomeini became supreme leader of the country in December 1979.