Correct Option: B

Iltutmish established Delhi as the capital of Sultanate. After the death of Aibak, the governor of Bengal revolted. He was defeated by Iltutmish. Iltutmish conquered Ujjain, Ranthambh or, Gwalior and Malwa and gained control over the whole of north India. Iltutmish suppressed the revolts of the Amires in the areas around Delhi. He made Delhi his capital.