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

• (a) Jawaharlal Nehru — Correct. The Ninth Schedule was added by the First Constitutional Amendment Act, 1951, which was enacted during Jawaharlal Nehru’s prime ministership.
• (b) Lal Bahadur Shastri — Incorrect. He became Prime Minister in 1964, long after the Ninth Schedule had already been introduced.
• (c) Indira Gandhi — Incorrect. Her tenure began in 1966; the Ninth Schedule was already part of the Constitution by then.
• (d) Morarji Desai — Incorrect. He became Prime Minister in 1977, much later than the 1951 amendment.

Answer: (a) Jawaharlal Nehru