Q. Prince Mahmud was the son of which of the following kings?
Answer: Balban
Notes: Prince Mahmud, son of Balban, was killed in the 1285 Battle of Beas River while fighting the Mongols. His death devastated Balban, who never smiled again, leading to his declining health and the weakening of the Delhi Sultanate, which facilitated the rise of the Khilji dynasty.