Correct Option: B

Chittor was named as Khizrabad during the Sultanate period. Alauddin Khilji, after the conquest of Gujarat captured Ranthambhor. In 1303, he attacked Chittor, the capital of Mewar which was ruled by the Ghuilot king Ratna Singh. Alauddin captured Chittor which was named Khizrabad, after Alauddin's son Khizr Khan.