How was 1st woman pm

I am assuming you meant who and not how Indra Gandhi was the first woman Prime Minister of India while for the world its Sirimavo Bandaranaike, the Sri Lankan Prime Minister from 1994 to 2000.

Indira Gandhi was 1st women the prime minister (P.M). Thank You!

Indira Gandhi was the first and, to date, only female Prime Minister of India. She was the daughter of Jawaharlal Nehru, the first prime minister of India.