5.
The answer is: C
Explanation
(C) The Constitution (Ninth Amendment) Act, 1960
Explanation
• The Re Berubari Union case (1960) dealt with the interpretation of Article 3 of the Constitution regarding the power of Parliament to cede territory to another country.
• The Supreme Court, in its advisory opinion, held that Parliament cannot cede Indian territory to a foreign state under Article 3; such power requires a Constitutional Amendment under Article 368.
• In light of this opinion, the Ninth Amendment Act, 1960 was passed to facilitate the implementation of the Indo-Pakistan Agreement (Nehru–Noon Agreement, 1958), which involved the transfer of Berubari Union (West Bengal) and certain enclaves to Pakistan.