Explanation:

- Option 1: Currency

- Central banks issue paper money, which is also known as currency.

- This includes banknotes that people use in daily transactions.

- Correct Answer: Currency

- Option 2: Credit Money

- This refers to any form of money that is not backed by physical reserves, like credit cards or loans.

- Central banks do not directly issue credit money; banks create it through lending.

- Option 3: Coins

- Issued by central banks or government mints, coins are typically used for smaller transactions.

- They complement paper currency in the money supply.

- Option 4: All of these

- This option suggests all forms are issued by central banks.

- While central banks issue currency and coins, they don’t issue credit money directly.