Option b is the correct answer. Shershah implemented significant coinage reforms during his rule, minting a substantial number of coins. He introduced the 11 gm silver rupee to replace the 10 gm bullion (mixed metal) tanka. These pure silver coins were known as Rupiya. Important Tips The word 'Rupee' finds its origins in the Sanskrit word "Rupiya," which means 'wrought silver'. The Guptas referred to their silver coins as Rupaka and their gold coins as Dinar. Presently, the rupiya or rupee serves as the commonly used currency name in countries such as India, Pakistan, Indonesia, Maldives, Nepal, Bhutan, Seychelles, and Sri Lanka.