Correct Option: B

In 1330 A.D, Delhi Sultan Muhammad bin Tughluq issued token currency; that is coins of brass and copper were minted whose value was equal to that of gold and silver coins. However, these coins totally lacked the artistic design and perfection in finishing and even the administrators of the king took no measure to keep the design secured and protected. This resulted in mass forging of the coins, leading to the failure of the scheme.