The correct option is C Alauddin Khalji
Alauddin Khalji was the most powerful and successful ruler of Khalji dynasty. He was the first ruler of the Sultanate period who not only established his empire in the north but also in the south. During his reign sultanate reached its farthest extent. In North he conquered Gujarat, Chittor, Ranthambhore etc. and in South, he conquered Devagiri, Warangal, Dwarasamudra, Madura etc.