The works Danasagara and Adbhutasagara were authored by which of the following Sena rulers?

Ballal Sen was the second ruler of the Sen dynasty of Bengal. Ballal Sen was known from the extant Kuljigranthas to have introduced social reforms in Bengal, especially the system of Kulinism.It is stated in the Adbhutsagar that he was engaged in warfare with the king of Gauda who is identified with Govindapala of the Pala dynasty.  Ballal Sen was a great scholar and renowned author. He wrote the Dansagar in 1168 and started writing the Adbhutsagar in 1169, but could not finish it.