Article 370 of the Constitution is a provision that grants special autonomy to the state of Jammu and Kashmir. It gives the state its own constitution, a separate flag, and the power to make its own laws, except in matters related to defense, foreign affairs, and communications. This provision was added to the Constitution to accommodate the unique circumstances of Jammu and Kashmir, which had a history of independence before its accession to India in 1947.

Options 1, 2, and 3 (Nagaland, Mizoram, Manipur) are incorrect because Article 370 is not applicable to these states. They do not have the same level of autonomy as Jammu and Kashmir.

Alert - correct answer should be "Jammu and Kashmir".