Correct Answer: A
Explanation:
The first Chief Minister of Jammu and Kashmir after the title was changed from Prime Minister was Ghulam Mohammed Sadiq.
Before 1965, the head of government in Jammu and Kashmir was called Prime Minister, due to the state`s special status under Article 370.
In 1965, the 6th Amendment to the Jammu and Kashmir Constitution changed the title from Prime Minister to Chief Minister, and Sadar-i-Riyasat to Governor.
Ghulam Mohammed Sadiq, who was the Prime Minister at the time, automatically became the first Chief Minister of Jammu and Kashmir under the new designation.