Which Amendment Act replaced the words 'Sadar-i-Riyasat', and 'Prime Minister' by 'Governor' and 'Chief Minister', respectively in the Jammu and Kashmir Constitution?

Answer: Option B

6^th Amendment Act, 1965 came in April, 1965. It replaced the words Sadar-i-Riyasat and Prime Minister by Governor and Chief Minister, respectively in the State Constitution. The First Schedule has been omitted by this Act.