Correct option is D
The term 'Hindustan' was popularized during the early Mughal period, particularly by Babur, the founder of the Mughal Empire. While the term has older origins, Babur used it to describe the northern region of the Indian subcontinent in his writings, particularly in the Baburnama. Over time, 'Hindustan' came to refer to the entire subcontinent in the Mughal era, becoming part of the political and cultural lexicon