Q. The Ninth Schedule was introduced in the Constitution of India during the prime ministership of

Answer: (a) Jawaharlal Nehru

The Ninth Schedule of the Indian Constitution contains a list of central and state laws which cannot be challenged in courts.
It was added by the Constitution (First Amendment) Act, 1951. The 13 laws were added to the schedule through the first Amendment in 1951.
The Ninth Schedule was added to the Constitution in 1951 through the First Amendment Act in response to the Supreme Court’s decision in the Shankari Prasad case(1951), which had ruled that laws enacted by the Parliament could be challenged if they violated the fundamental rights guaranteed by the Constitution.
The Ninth Schedule is a special provision in the Constitution of India that allows the legislature to exempt certain laws from judicial review through a constitutional amendment.
The Ninth Schedule was brought by adding new Article 31B, which along with Article 31A enacted with the aim of protecting laws related to agrarian reform and to abolish the Zamindari System.
The laws included in the Ninth Schedule are immune to being challenged in the court on the grounds of inconsistency with the fundamental rights guaranteed by the Constitution of India.