The correct option is B All of the above
Nalanda University is located in Rajgir, near Nalanda, Bihar, India. It stands for a university which attracted students and scholars from across Asia and even farther away. It was developed under the patronage of the Gupta dynasty and was the first international residential university in the world which could accommodate thousands of scholars. They had to appear for an examination at the entrance gate to seek admission. Also, it had a huge library stocked with thousands of books on various topics.