Correct Answer: (d) Bihar
Solution:In the above-given options, Nalanda is the most ancient monastery in Bihar. The history of Nalanda, the ancient university town of Bihar, goes back to the days of Buddha and Mahavir in the sixth century BC. However, excavations have not revealed anything to suggest that the site was occupied before the Gupta period (fifth century A.D.). The University of Nalanda was set up by Kumargupta I, one of the famous rulers of the Gupta Dynasty. During its peak time, it attracted several scholars and students even from foreign.