The Ninth Schedule was introduced in the Constitution of India during the Prime Ministership of

The correct option is Jawaharlal Nehru.

Step-by-step explanation:

1. Introduction of the Ninth Schedule:
The Ninth Schedule was added to the Constitution of India by the First Constitutional Amendment Act, 1951.

2. Purpose of the Ninth Schedule:
It was created to protect land reform laws and other laws from being challenged in courts on the grounds of violating Fundamental Rights, particularly the Right to Property (which was a fundamental right at that time).

3. Prime Ministership at the Time:
The First Amendment was enacted in 1951 when Jawaharlal Nehru was serving as the first Prime Minister of independent India (his tenure lasted from August 15, 1947 to May 27, 1964).

Therefore, the Ninth Schedule was introduced during the Prime Ministership of Jawaharlal Nehru.