The correct answer is (d) Kuninda.
The Kunindas were a Himalayan kingdom that ruled over the region of Garhwal and Kumaon in the Indian subcontinent from the 1st century BCE to the 6th century CE. They were a powerful and influential kingdom, and their coins have been found in many parts of the region.
The Yajna Vedika site at Purola is a major archaeological site that is believed to have been a religious center for the Kunindas. The site has yielded a number of important artifacts, including coins, pottery, and sculptures.
The copper coins that were found at the Yajna Vedika site are inscribed with the name of the Kuninda king Vajrahasta. These coins are evidence of the Kunindas’ power and influence in the region.
The other options are incorrect. The Katyuris were a dynasty that ruled over the region of Garhwal in the 9th-10th centuries CE. The Kushans were a Central Asian empire that ruled over much of the Indian subcontinent in the 1st-3rd centuries CE. Paurav Varman was a king of the Katyuri dynasty who ruled in the 9th century CE.