Sanghabhuti, an Indian Buddhist monk, who travelled to China at the end of the fourth century AD, was the author of a commentary on:

(a). Prajnaparamita Sutra

(b). Visuddhimagga

(c). Sarvastivada Vinaya

(d). Lalitavistara

Explanation: 

Prajnaparamita Sutra: While there are many commentaries on the Prajnaparamita Sutra, Sanghabhuti is not historically associated with writing one.

Visuddhimagga: This text is from the Theravada tradition, and Sanghabhuti is identified as a Mahayana scholar. Commentaries on the Visuddhimagga are typically by Theravada monks.

Sarvastivada Vinaya: This is the monastic code of the Sarvastivada school of Buddhism. Sanghabhuti's expertise aligns with this tradition, making him a likely author of a commentary on this specific Vinaya text.

Lalitavistara: This Mahayana text details the life of the Buddha. While commentaries exist, Sanghabhuti is not known for writing one on this particular text.

The correct answer is Option (c).