Question

_____used the term hindustan to refer to the areas under the sultanate.​

Answer 1

Babur used the term hindustan to refer to the areas under the sultanate.

Answer 2

Minhaj-i-Siraj

In the thirteenth century Minhaj-i-Siraj used the term 'Hindustan'. He meant areas of Punjab, Haryana and the lands between Ganga and Yamuna. He used this term in a political sense that were a part of the dominions of the Delhi Sultanate.