Morarji Desai was a prominent leader of which of the following Party?

Congress (O)

Morarji Desai, a prominent leader of Congress (O), who was the main rival of Indira Gandhi when he was in the Congress, announced that he would go on an indefinite fast if fresh elections were not held in the State. Under intense pressure from students, supported by the opposition political parties, assembly elections were held in Gujarat in June 1975. The Congress was defeated in this election.