The correct option is C A Chinese Buddhist pilgrim
Faxian was a Chinese Buddhist pilgrim who was travelling around the world. He came to India during the rule of Chandragupta II. He visited places such as Mathura, Kanauj, Vaishali, etc., and kept a travelogue describing the places he visited.
The travelogue 'Si-Yu-Ki' is the work of another Chinese traveller, Huan Tsang.