The correct option is C 4,3,2,1
The Mamluk nobles had appointed an infant sultan in order to control power, but an officer named Jalal-ud-din had other plans. The nobles tried to kill Jalal-ud-din , but he survived and had them killed instead. So, Jalal-ud-din Khilji came to power at 70 years old. But soon, he was assassinated by his own nephew and son-in-law Ali Gurshasp, who took over the throne to become one of the most famous rulers of the Delhi Sultanate. Ali Gurshasp took on the title 'Alauddin' after he was crowned as the king.