Answer : 4. "सिंहविष्णु "
Explanation :

Dandin, a famous Sanskrit writer & Poet, was the court poet of Narsimhavarman II. Narsimhavarman II: The famous Pallava King Narsimhavarman II was known as Rajasimha. His Period reign was 695-722 A.D. He Build Kailasanatha at Kanchipuram & Shore temple at Mamallapuram. Famous writer Dandin was the court poet of him. He sent embassies to China. Maritime trade flourished during his reign.