Explanation:

- Liquid assets are assets that can be quickly converted into cash with minimal loss in value.

- Debtors: The money owed to a company by its clients or customers. It's generally considered a part of liquid assets because it can be converted to cash relatively quickly once collected.

- Bills Receivable: These are written agreements where others promise to pay a specific sum of money on a set date. Like debtors, they are expected to be collected soon and can be considered liquid.

- Bank Balance: This represents the cash available in a company's bank account. It's the most liquid form of asset easily accessible for business needs.

- Answer: All of the Above