Option b is the correct answer. Banabhatta was a court poet and biographer of Harsha. Banabhatta wrote the Harshacharita, which is a Sanskrit prose work that narrates the life and achievements of Harsha. The Harshacharita is one of the most important sources of Indian history and culture for the 6th and 7th centuries CE . Important Tips Vishnugupta: Vishnugupta was the last known ruler of the Gupta dynasty, who reigned from 540 CE to 550 CE. He was the son and successor of Kumaragupta III, who had lost most of the Gupta empire to the Huna invaders. Vishnugupta tried to restore the Gupta glory by fighting against the Hunas, but he was unsuccessful. Parimalgupta: Parimalgupta was a ruler of the Later Gupta dynasty, who ruled from 560 CE to 580 CE. He was the son and successor of Adityasena, who had revived the Later Gupta power in Magadha after a period of decline.