Correct Option (A):
The silver coins issued by the Gupta emperors were known as Rupaka. These coins were standardized and widely circulated, reflecting the economic stability and administrative efficiency of the Gupta Empire.
Incorrect Options:
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Karshapana: This was an ancient Indian coin, typically made of silver or copper, and often punch-marked. It predates the Gupta period, being prevalent during the Mauryan and pre-Mauryan eras.
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Dinara: This term referred to the gold coins issued by the Gupta rulers. The Dinara was a significant aspect of the Gupta monetary system, often showcasing elaborate iconography and inscriptions.
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Pana: Pana was an ancient unit of currency or weight mentioned in various early Indian texts, including the Arthashastra. It was not specifically a silver coin issued by the Guptas.