The correct option is A some banks under a law during the Prime Ministership of Mrs. Indira Gandhi
The government of India issued an ordinance (Banking Companies Acquisition and Transfer of Undertakings Ordinance, 1969) and nationalised the 14 largest commercial banks with effect from the midnight of July 19, 1969 under the prime ministership of Mrs. Indira Gandhi. These banks contained about 85% of the total bank deposits of the country at that time.