Which of the following statements are correct? 1. Hiuen Tsang was a Chinese traveller who visited during the reign of Harsha 2. Harshvardhana wrote Ratnavali, Nagananda and Priyadarshika. 3. Harsha sent an embassy to the court of Kurasou II 4. The Harshacharita was written by Banabhatta.

a. 1, 2, 3 and 4.
b. 1, 2, and 4.
c. 1, 3, and 4
d. 2, 3, and 4