Explanation

Fa-Hien (Faxian) was a Chinese Buddhist pilgrim who visited India with the objective of studying Buddhism and collecting sacred texts.

Option B is correct. He travelled during the reign of Chandragupta II (Vikramaditya) in the Gupta period (c. 399–414 CE), which is considered a phase of great prosperity and stability.

During his journey, he visited major centres like Pataliputra, Mathura, Sarnath, Kapilavastu, focusing mainly on Buddhist monasteries and sacred sites.

His travel account, “Record of Buddhistic Kingdoms”, provides important insights into the religious life, social conditions, and economic prosperity of India during the Gupta age.

Thus, Fa-Hien is correctly associated with the reign of Chandragupta II.