The correct answer is Durand Cup.
The Durand Cup is the oldest football tournament in India and Asia, and the third oldest football tournament in the world. It was started in 1888 by Sir Mortimer Durand, who was the Foreign Secretary of British India at that time.
The tournament began in Shimla and later moved to different cities. Today it is held mainly in Kolkata and is organised with support from the Indian Army, given its origin as a tournament for British troops in India.