Introduction:
Hiuen Tsang was a Chinese Buddhist monk, scholar, traveler, and translator who visited India during the 7th century. He is known for his detailed and accurate accounts of India's political, social, economic, and religious conditions during that period.

Harshavardhana:
Hiuen Tsang visited India during the reign of Harshavardhana, who ruled over the north and central parts of India from 606 to 647 AD. Harshavardhana was a patron of Buddhism and other religions, and his court was known for its intellectual and cultural vibrancy. Hiuen Tsang spent several years in India, studying Buddhism and other subjects, and also visited several important sites of pilgrimage and learning.

Chandragupta II:
Chandragupta II, also known as Vikramaditya, was a powerful ruler of the Gupta dynasty who ruled over a large part of northern India from 375 to 415 AD. He was known for his military conquests, patronage of the arts and sciences, and his support for the Hindu religion. However, Hiuen Tsang did not visit India during his reign, as he lived several centuries later.

Chandragupta I:
Chandragupta I was the founder of the Gupta dynasty who ruled over a small kingdom in northeastern India from 320 to 335 AD. He was known for his military campaigns and his patronage of the arts and sciences. However, Hiuen Tsang did not visit India during his reign, as he lived several centuries later.

Rudradaman:
Rudradaman was a ruler of the Western Kshatrapas dynasty who ruled over parts of western and central India in the 2nd century AD. He was known for his military campaigns and his patronage of Buddhism. However, Hiuen Tsang did not visit India during his reign, as he lived several centuries later.

Conclusion:
In conclusion, Hiuen Tsang visited India during the reign of Harshavardhana, who ruled over the north and central parts of India from 606 to 647 AD. He did not visit India during the reign of Chandragupta II, Chandragupta I, or Rudradaman, as they lived several centuries earlier. Hiuen Tsang's accounts of India provide valuable insights into the country's history, culture, and religion during a crucial period.