The correct option is (a).
Explanation
Sterilization is a monetary action taken by a central bank to neutralize the impact of its foreign exchange market interventions on the domestic money supply. It ensures that the domestic economy remains insulated from the monetary side-effects of external sector management.
Detailed Analysis
- Conducting 'Open Market Operations' (Correct): When the Reserve Bank of India (RBI) purchases foreign currency (e.g., US Dollars) to prevent the appreciation of the Rupee, it injects domestic currency (Rupees) into the market. This increases the monetary base and liquidity, which could lead to inflation. To counter (or "sterilize") this expansionary effect, the RBI sells an equivalent amount of Government Securities through Open Market Operations (OMOs). This sale absorbs the excess liquidity from the banking system, keeping the money supply stable.
- Oversight of settlement and payment systems: This refers to the RBI's regulatory role in ensuring safe and efficient payment mechanisms (e.g., UPI, NEFT, RTGS) under the Payment and Settlement Systems Act, 2007. It is unrelated to liquidity sterilization.
- Debt and cash management for Governments: This falls under the RBI's function as a "Banker to the Government," where it manages public debt and government accounts. While OMOs involve government securities, the specific act of managing debt issuance is distinct from the sterilization of forex flows.
- Regulating Non-banking Financial Institutions: This is a supervisory function aimed at financial stability and consumer protection, not a tool for managing money supply fluctuations caused by forex interventions.
Key Takeaway
Sterilization is the specific use of Open Market Operations (OMOs) by the central bank to offset the changes in the monetary base caused by its intervention in the foreign exchange market.