Explanation:

- Controller of Money Supply:

- The Central Bank regulates the amount of money circulating in the economy through various monetary policies.

- This is a core function to manage inflation and stabilize the currency.

- Banker’s Bank:

- The Central Bank serves as the banker to commercial banks.

- It holds reserves, provides loans, and facilitates interbank transactions.

- Issue of Currency:

- The Central Bank is responsible for the production and distribution of the nation's currency.

- It ensures there is an adequate supply of money.

- None of these:

- This option implies that all previous functions are not roles of the Central Bank.

Correct Answer: None of these