The correct answer is: Nicolo Conti.
Nicolo Conti was an Italian merchant and traveler who visited India during the Vijayanagara period. He was the first European to write about the Vijayanagara Empire, and his accounts provide valuable insights into the history and culture of the empire.
Megasthenes was a Greek ambassador who visited India during the Mauryan period. He is best known for his book Indica, which provides a detailed account of Indian society and culture.
Yuan Chawng was a Chinese Buddhist monk who visited India during the Tang dynasty. He is best known for his book Da Tang Xiyu Ji, which provides a detailed account of his travels through India.
Fa-Hien was a Chinese Buddhist monk who visited India during the Gupta period. He is best known for his book Faxian’s Travels, which provides a detailed account of his travels through India.
All of these travelers provided valuable insights into India, but only Nicolo Conti visited India during the Vijayanagara period.