Assertion (A): Sultan Muhammad bin Tughlaq issued currency of copper coins and declared them as legal tender. Reason (R): Sultan's treasury was empty because of his short-Sighted projects

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but R is not a correct explanation of A
• C. A is true but R is false
• D. A is false but R is true