Answer : 3. "हर्षवर्धन के दरबारी कवि हरिषेण थे"
Explanation :

Banabhatta was the court poet of king Harshavardhana. Banabhatta wrote Harshvardhan's biography Harshacharita in Sanskrit. Harshavardhana was born in 590 AD. He belonged to the Vardhana dynasty. He ruled North India from 606 AD to 647 AD. Kannauj city, present-day Uttar Pradesh was his capital. The Chinese Traveller Xuanzang visited the king and wrote about his reign. Emperor Samudragupta's court poet was Harisena.