Step 1: Understanding the Concept:
The RBI performs several roles. One specific role is being the "Banker, Agent, and Advisor to the Government."
Step 2: Detailed Explanation:
1. As a Banker: It maintains accounts and carries out banking business for the government (Option A).
2. As an Agent: It manages public debt and issues government securities (Option B).
3. As an Advisor: It provides advice on economic and monetary policy matters (Option C).
4. Periodic Inspections: This falls under the Supervisory Function of the RBI, where it monitors and regulates commercial banks to ensure they follow rules. This is part of being the "Banker's Bank," not the "Banker to the Government."
Step 3: Final Answer:
Option (D) is a function of the RBI as a regulator/supervisor of the banking system, not as an agent to the government.