The correct answer is: C. Nakula-Digvijayam
Nakula-Digvijayam is an ancient Sanskrit text that describes the conquests of the Pandava prince Nakula. The text is believed to have been composed in the 2nd century BCE, and it is one of the earliest surviving accounts of the Mahabharata.
The text mentions Rohtak district in several places. In one passage, Nakula is said to have conquered the city of Rohtak after defeating its king, Virabhadra. In another passage, Nakula is said to have built a temple to the god Vishnu in Rohtak.
The mention of Rohtak district in Nakula-Digvijayam is significant because it provides evidence of the city’s existence in the early centuries BCE. The text also suggests that Rohtak was an important city at the time, as it was the site of a major battle and the location of a temple to Vishnu.
The other options are incorrect because they do not mention Rohtak district. Divyavdan is a Buddhist text that was composed in the 1st century CE. Majihima Nikaya is a Buddhist text that was composed in the 3rd century BCE. Kathakosh is a collection of Hindu stories that was composed in the 10th century CE.