The correct answer is: A. Harshavardhana.
Harshavardhana was an Indian emperor who ruled the northern Indian subcontinent in the 7th century. He was the founder of the Harsha Empire, which at its peak included most of the Indian subcontinent north of the Narmada River. Harsha was a powerful and successful ruler, and he is remembered for his military conquests, his patronage of the arts, and his religious tolerance.
Thanesar was an important city in the Harsha Empire, and it served as Harsha’s capital for a time. The city was located on the banks of the Yamuna River, and it was a major center of trade and commerce. Thanesar was also a center of learning, and it was home to several important Buddhist monasteries.
The other options are incorrect. Ashoka was an Indian emperor who ruled the Mauryan Empire in the 3rd century BCE. Chandragupta Vikramaditya was an Indian emperor who ruled the Gupta Empire in the 4th century CE. Kanishka was an Indian emperor who ruled the Kushan Empire in the 1st century CE.
Ashoka was a powerful and successful ruler, and he is remembered for his military conquests, his Buddhist reforms, and his construction of many stupas and pillars. Chandragupta Vikramaditya was a powerful and successful ruler, and he is remembered for his military conquests, his patronage of the arts, and his promotion of education. Kanishka was a powerful and successful ruler, and he is remembered for his military conquests, his promotion of Buddhism, and his construction of many stupas and monasteries.