Explanation: After two decades of conflict amongst the Shamsi bandagan and successive Delhi Sultans, in 1254, Ulugh Khan, a junior, newly purchased slave in Iltutmish’s reign and now the commander of the Shivalikh territories in the Northwest, seized Delhi.

He took the title of na’ib-i mulk, the Deputy of the Realm, seizing the throne as Sultan Ghiyas al Din Balban in 1266.

Source: NCERT