In whose reign were the Mongols seen on the bank of the Indus for the first time?

Correct answer: (b) Iltutmish

Explanation

The Mongols first appeared on the Indus in 1221, in the reign of Iltutmish. Genghis Khan was chasing Jalal-ud-din Mangbarni, the prince of Khwarazm, who fled to India and asked Iltutmish for shelter.

Iltutmish politely refused, to avoid giving the Mongols a reason to attack, and Genghis Khan turned back. Under Balban and Alauddin Khilji the Mongol raids became a serious danger.