Under which provision of the Indian Constitution, Kashmir was given a special status?

The correct option is Article 370.

Here is a detailed explanation of the provision:
Article 370 of the Indian Constitution was a temporary provision that granted a special autonomous status to the state of Jammu and Kashmir. Under this article, the state was allowed to have its own constitution, a separate flag, and independence over its internal administration, except in matters related to defense, foreign affairs, finance, and communications.

This provision was drafted in 1947 by Sheikh Abdullah and was incorporated into the Indian Constitution in 1949 as a temporary measure. On August 5, 2019, the Government of India issued a presidential order that made Article 370 inoperative, thereby revoking the special status of Jammu and Kashmir and fully integrating the region into the Indian Union.

To understand why the other options are incorrect:
1. Article 324: Relates to the superintendence, direction, and control of elections being vested in an Election Commission.
2. Article 364: Contains special provisions as to major ports and aerodromes.
3. Article 375: States that courts, authorities, and officers will continue to function subject to the provisions of the Constitution.