Q. Which of the following Prime Minister of India was not a member of the Rajya Sabha, when he took the position?
Answer: B
Notes:
In Britain, the prime minister should be a member of the Lower House (House of Commons) of the Parliament. In India, the prime minister may be a member of any of the two Houses of Parliament.
For example, three prime ministers, Indira Gandhi (1966), Deve Gowda (1996), and Manmohan Singh (2004), were members of the Rajya Sabha.
Source: Indian Polity by Laxmikanth
