Firm’s promise to pay and is backed or guaranteed by bank is classified as

customer's acceptance
banker's acceptance
federal acceptance
treasury acceptance

The correct answer is: B. Banker’s acceptance

A banker’s acceptance is a draft drawn on and accepted by a bank. It is a type of negotiable instrument that is used in international trade. Banker’s acceptances are typically used to finance the import or export of goods.

A customer’s acceptance is a draft drawn by a customer on a bank. It is not backed or guaranteed by the bank, and is therefore considered to be a riskier investment than a banker’s acceptance.

A federal acceptance is a type of banker’s acceptance that is issued by the Federal Reserve Bank. Federal acceptances are used to finance the sale of government securities.

A treasury acceptance is a type of banker’s acceptance that is issued by the U.S. Treasury. Treasury acceptances are used to finance the sale of Treasury bills, notes, and bonds.

Here is a table that summarizes the key differences between the four types of acceptances:

| Type of acceptance | Issuer | Backed or guaranteed by a bank? | Used in international trade? |
| — | — | — | — |
| Banker’s acceptance | Bank | Yes | Yes |
| Customer’s acceptance | Customer | No | No |
| Federal acceptance | Federal Reserve Bank | Yes | No |
| Treasury acceptance | U.S. Treasury | Yes | No |