Correct Option: A. Money in the tills of the bank Explanation of Why Option A is Correct:

1. Definition of Assets: In the context of a commercial bank, assets are resources owned by the bank that can generate revenue. Common assets include loans, investments, and cash reserves.
2. Money in the Tills: The term "money in the tills" refers to the physical cash that a bank keeps on hand to meet daily operational needs, such as withdrawals by customers and transactions. This cash is not invested or loaned out; it is simply held for liquidity purposes.
3. Revenue Generation: For an asset to yield revenue, it must be able to generate interest or returns. Money in the tills does not earn interest or generate any revenue for the bank. Instead, it is a necessary liquidity reserve that allows the bank to operate smoothly but does not contribute to its income.
4. Opportunity Cost: While the bank holds cash in its tills, it forgoes the opportunity to invest that money in interest-earning assets. This is known as the opportunity cost of holding cash. Therefore, the cash in the tills is essentially a non-revenue-generating asset.

Explanation of Why Other Options are Incorrect:

• Option B: Money at Call:
• Definition: Money at call refers to funds that a bank can lend out on short notice, typically to other banks or financial institutions.
• Revenue Generation: This type of asset earns interest when the bank lends it out, making it a revenue-generating asset. Therefore, it does yield revenue, which makes this option incorrect.
• Option C: Treasury Certificates:
• Definition: Treasury certificates are short-term government securities that pay interest to the holder.
• Revenue Generation: These certificates yield interest income, making them a source of revenue for the bank. Thus, this option is also incorrect.
• Option D: Treasury Bills:
• Definition: Treasury bills (T-bills) are short-term government debt instruments that are sold at a discount and mature at face value, with the difference being the interest earned.
• Revenue Generation: Like Treasury certificates, T-bills generate revenue through the interest earned upon maturity. Therefore, this option is incorrect as well.

Summary of Key Points:

• Money in the tills is a liquidity reserve and does not generate revenue for the bank.
• Money at call, Treasury certificates, and Treasury bills are all revenue-generating assets.
• Understanding the nature of different bank assets is crucial for recognizing which contribute to income.
• Opportunity cost is an important concept when considering the implications of holding cash versus investing it.

This thorough understanding of bank assets will help you in your economics studies and professional exams.