Final answer:
A bill of exchange is a three-party instrument in which the drawer orders the drawee to pay money to the payee.
Step-by-step explanation:
The answer to the question is a. Bill of exchange.
A bill of exchange is a written order from the drawer (the party who issues the bill) to the drawee (the party who is ordered to pay) to pay a certain amount of money to the payee (the party who receives the payment).
For example, if a company purchases goods from another company on credit, they may issue a bill of exchange to the seller, instructing the buyer's bank to pay the seller a specific amount at a future date.