The Chinese traveler Xuanzang (Hsuan-tsang) visited the Pallava capital during the reign of:

The correct answer is: b) Narasimhavarman I.

Xuanzang (Hsuan-tsang) was a Chinese Buddhist monk, scholar, traveler, and translator who lived during the Tang dynasty (618–907). He is best known for his travels to India in search of Buddhist scriptures, which he translated into Chinese.

Xuanzang visited the Pallava capital of Kanchipuram during the reign of Narasimhavarman I (630–668). Narasimhavarman I was a powerful and influential ruler who is credited with expanding the Pallava kingdom and promoting Buddhism.

Xuanzang’s account of his travels to India is an important source of information about the history and culture of India during the 7th century. His descriptions of the Pallava kingdom and its capital city are particularly valuable.

The other options are incorrect because:

• Mahendravarman I (580–630) was the father of Narasimhavarman I.
• Narasimhavarman II (680–720) was the grandson of Narasimhavarman I.
• Nandivarman II (730–795) was the great-grandson of Narasimhavarman I.