In Harshavardhana court, a Chinese embassy was sent by the T'ang emperor. The T’ang dynasty was formed in 618 due to the failed exhibitions to Korea by the Sui, which had led to conflicts in the north of China. The T’ang’s founder, Li Yuan was a rebel from an aristocratic family (traced from the Han) that was influential under the Northern Zhou. The T’ang took some time to become established, in part due to a rebellion in 617 that took several years to succeed with the help of the Turks.

T'ang emperor was one of the greatest emperors of China who ruled during the T'ang dynasty from 618 to 907 AD. During his reign, he established diplomatic relations with various foreign countries, including India. As part of these diplomatic efforts, he sent a Chinese embassy to India.

The correct answer to the question is option 'C', Harshavardhana. Harshavardhana was a prominent ruler of the Indian subcontinent during the 7th century. He was the king of Thanesar and later united northern India under his rule. Harshavardhana was known for his patronage of learning, culture, and religion, and his empire served as a center of trade and diplomacy.

The T'ang emperor sent a Chinese embassy to the court of Harshavardhana in order to establish friendly relations and promote cultural and economic exchanges between China and India.

Explanation:

1. T'ang Emperor's Diplomatic Efforts:
- T'ang emperor, during his reign, sought to expand diplomatic relations with other countries.
- He believed in the importance of establishing friendly ties with neighboring nations.
- As part of his diplomatic efforts, he sent embassies to various countries to strengthen political and cultural relations.

2. Chinese Embassy to India:
- As part of his diplomatic endeavors, the T'ang emperor sent a Chinese embassy to India.
- The embassy was sent to the court of Harshavardhana, the prominent ruler of northern India during that time.
- The purpose of the embassy was to establish friendly relations between China and India and to promote cultural and economic exchanges.

3. Harshavardhana's Rule:
- Harshavardhana was a powerful ruler who reigned over a vast empire in northern India.
- He was known for his patronage of learning, arts, and religion.
- Harshavardhana's court was a center of cultural and intellectual activities, attracting scholars, artists, and traders from various parts of the world.

4. Importance of the Embassy:
- The embassy sent by the T'ang emperor to Harshavardhana's court played a crucial role in promoting cultural exchange between China and India.
- It facilitated the exchange of ideas, knowledge, and trade between the two ancient civilizations.
- The embassy helped strengthen diplomatic ties between the two countries and laid the foundation for future interactions.

In conclusion, the Chinese embassy sent by the T'ang emperor was received by Harshavardhana, the ruler of northern India. This embassy played a significant role in promoting cultural and economic exchanges between China and India during the 7th century.