Solution:Bakhtiyar Khilji is said to have destroyed the universities of Nalanda and Vikramshila. Campaigning in eastern India, Bakhtiyar Khilji destroyed the universities of Odantapuri, Vikramshila, and Nalanda. Disguised as merchants, with only 18 horsemen, he attacked the Sena capital, Nadia. King Lakshmansen fled, and after taking control, the invaders indulged in extensive plunder. Thus, the Ottoman Empire spread across almost all of northern India.