Answer : 3. "Nalanda "
Explanation :

In India, Nalanda university was established in 5th century by KumarGupta first (415-455 AD). The famous chinese Traveller Hsuan Tsang lived there and studied for 18 months. At that time ‘Sheel Bhadra Yajee’ was the chancellor of Nalanda university. The famous scholars of this university were ‘Chandragomina’ ‘Shantirakshit’ and Kashmiri monk ‘Padmasambhava’