The correct option is B All
Nalanda was a Mahavihara, a large Buddhist monastery, in the ancient kingdom of Magadha. It was once famous ancient center of higher learning. It is a UNESCO World Heritage Site. Some of the notable scholars who taught at Nalanda were Nagarjuna ( one of the most important Mahayana philosophers) , Dinnaga (one of the Buddhist founders of Indian logic), Dharmapala (second ruler of the Pala Empire of Bengal region), etc.