The correct answer is B. Kalhana.
Kalhana was a Kashmiri historian who wrote the Rajatarangini, a chronicle of the kings of Kashmir. The Rajatarangini is considered to be one of the most important works of medieval Indian literature.
Banbhata was a Sanskrit poet who wrote the Harshacharita, a biography of the king Harshavardhana. Abul Fazal was a Mughal historian who wrote the Akbarnama, a biography of the emperor Akbar. Tulsi Das was a Hindi poet who wrote the Ramacharitamanasa, an epic poem about the life of Rama.
Banbhata’s Harshacharita is a valuable source of information about the reign of Harshavardhana. Abul Fazal’s Akbarnama is an important source of information about the reign of Akbar. Tulsi Das’s Ramacharitamanasa is a popular religious text.
However, the Rajatarangini is the only work on this list that is a chronicle of kings. Therefore, it is the only work that is relevant to the question.