Answer : 1. "Delhi"
Explanation :

The inaugural ‘Parivartan Chintan’ Tri-Services Armed Forces Planning Conference was organized by the Union Defense Ministry on April 8, 2024 in New Delhi. Led by the Department of Military Affairs as well as the chiefs of the Army, Navy and Air Force, the objective of the conference was to establish a unified theater command. Chaired by Chief of Defense Staff General Anil Chauhan, it sought to promote jointness, integration and readiness for future conflicts through innovative reforms and initiatives.