The correct option is D He died after a fall from his horse while playing Chaugan
Qutubuddin Aibak died of injuries he received from falling off his horse while playing a game of Chaugan. He was buried in Lahore, Pakistan. His successor, Iltutmish, basing his power on the conquests of Qutubuddin Aibak, was able to establish the independence of the Delhi Sultanate under the Mamluk dynasty.