The correct answer is A. Udhampur.
The Northern Command is one of the five operational commands of the Indian Army. It is headquartered in Udhampur, Jammu and Kashmir. The command is responsible for the security of the Indian states of Jammu and Kashmir, Ladakh, Himachal Pradesh, Uttarakhand, and Punjab, as well as the Indian-controlled portion of Kashmir.
The Northern Command was formed on 1 October 1972, with Lieutenant General K.P.S. Gill as its first General Officer Commanding-in-Chief (GOC-in-C). The command has a strength of over 200,000 personnel, and is divided into four corps: the 14th Corps, the 15th Corps, the 19th Corps, and the 21st Corps.
The Northern Command has been involved in a number of conflicts, including the Indo-Pakistani War of 1971, the Kargil War of 1999, and the ongoing insurgency in Jammu and Kashmir. The command has also been involved in a number of humanitarian operations, including the relief efforts following the 2005 Kashmir earthquake.
The Northern Command is a vital part of the Indian Army, and plays a key role in the security of India’s northern borders.