Correct Option: A. Increasing the import duties Explanation of the Correct Answer: Monetary policy refers to the actions taken by a country's central bank to manage the money supply and interest rates to achieve macroeconomic objectives such as controlling inflation, consumption, growth, and liquidity. The tools of monetary policy primarily involve managing the money supply and influencing interest rates.

1. Increasing Import Duties:
2. Import duties are taxes imposed on goods brought into a country. This action is a part of trade policy, not monetary policy. Trade policy focuses on regulating international trade and protecting domestic industries, while monetary policy is concerned with the overall economy's money supply and interest rates.
3. Therefore, increasing import duties does not fall under the purview of monetary policy, making option A the correct answer.

Explanation of the Other Options: B. Buying or Selling Treasury Bills by the Central Bank: - This is a key tool of monetary policy known as open market operations. When the central bank buys treasury bills, it injects liquidity into the economy, increasing the money supply. Conversely, selling treasury bills withdraws liquidity, decreasing the money supply. This directly influences interest rates and is a fundamental aspect of monetary policy. C. Printing of More Currency Notes: - The central bank can decide to print more currency notes to increase the money supply. This action can lead to inflation if not managed properly. While it is a controversial and less common tool in modern monetary policy, it is still considered a part of monetary policy as it directly affects the money supply. D. Increasing or Decreasing Cash Reserve Ratio by the Central Bank: - The cash reserve ratio (CRR) is the percentage of a bank's total deposits that must be held in reserve with the central bank. By increasing the CRR, the central bank reduces the amount of money available for banks to lend, thus tightening the money supply. Conversely, decreasing the CRR allows banks to lend more, increasing the money supply. This is a direct tool of monetary policy. Summary of Key Points:

• Monetary Policy: Involves managing the money supply and interest rates to achieve economic goals.
• Correct Answer (A): Increasing import duties is a trade policy action, not a monetary policy action.
• Open Market Operations (B): Buying/selling treasury bills is a primary tool of monetary policy.
• Currency Printing (C): While controversial, it is a method to influence the money supply.
• Cash Reserve Ratio (D): Adjusting the CRR is a direct monetary policy tool affecting bank lending.

Revision Summary:

• Monetary policy focuses on money supply and interest rates, not trade policies.
• Increasing import duties is not a monetary policy action.
• Key tools of monetary policy include open market operations, currency printing, and adjusting the cash reserve ratio.
• Understanding the distinction between monetary and trade policy is crucial for economic analysis.