Explanation

Correct Answer: A

A central bank's primary functions include:

1. Lender of last resort - This is a key function where central banks provide emergency liquidity to banks facing serious shortages or financial distress to prevent systemic banking crises.

2. Monopoly supplier of currency - Central banks are typically the sole issuer of a country's currency (Option B is incorrect because central banks are usually the only supplier, not one of many).

3. Manager of foreign currency reserves - Central banks actively manage a country's foreign exchange reserves (Option C is incorrect).

4. Conduct monetary policy - Setting interest rates and controlling money supply.

5. Regulator of the banking system - Overseeing commercial banks and financial institutions.

6. Government's bank - Acting as banker and fiscal agent for the government.

The statement in Option A accurately describes the lender of last resort function, which is a fundamental role of central banks in maintaining financial stability.