Sirima Bandaranaike was the world's first female prime minister when she became Prime Minister of Sri Lanka on:
سری لنکا کی وزیر اعظم بننے کے بعد سریما بندرانائیک دنیا کی پہلی خاتون وزیر اعظم کب بنی تھیں۔
Answer: 21 July 1960
Explanation
Sirimavo Bandaranaike became first female head of government in modern history.
Sirima Bandaranaike was the world's first female prime minister when she became Prime Minister of Sri Lanka on 21 July 1960.
