Answer: D
Kalhan as a historian: Kalhan is an important historian in Indian history. The 12th century A.D.Kashmiri poet, Kalhan, wrote "Rajtarangini" - the river of kings. Which has been of great value for the study of the history of Kashmir. This history of his native land is in verse and the language is Sanskrit. Out of the Sanskrit writings, Rajtarangini is one of the foremost historical writing.