Which Gupta ruler is credited with founding the Nalanda Mahavihara?

The correct answer is C, Kumaragupta I. Kumaragupta I, who bore the title Mahendraditya, is credited with founding the Nalanda Mahavihara in present-day Bihar. Later rulers, including Harshavardhana and the Palas, endowed it further, and it grew into the largest residential centre of Buddhist learning in Asia before it was destroyed in the late twelfth century. Its fame rests largely on the detailed account left by the seventh century pilgrim Hiuen Tsang, who studied there.

Option A, Samudragupta, is remembered for conquests and for the Prayag Prashasti. Option B, Chandragupta II, is linked with the Shaka conquest, the Vakataka marriage alliance and the visit of Fa-Hien, who in fact does not describe Nalanda as a great university. Option D, Skandagupta, spent his reign defending the empire against the Hunas and restoring the Sudarshana lake in Saurashtra.