Correct Answer: (b) Dinara
Solution:Gold coins issued by Gupta rulers were known as Dinar. According to Fa hien, people used Dinar for daily business the term "nishka" was used to describe a gold coin or ornament that was used for trade, as currency, or as barter. The Rigveda mentions nishka as a payment, decoration, gift, or neck ornament. It was also described as both gold and silver, and it likely had a definite weight and worth.