Answer : 2. "Defense Ministry"
Explanation :

The Border Roads Organization (BRO) celebrated its 65th Raising Day on May 7, 2024, with a ceremony in New Delhi led by Union Defense Secretary Giridhar Aramane. Established by the Nehru government in 1960, BRO runs important road projects for the Army. Specifically, Project Tusker, now Project Vartak, connects Bhalukpong to Tengah in Arunachal Pradesh, while Project Beacon focuses on Kashmir.