Concept:A purchase ledger is used to record amounts owed to suppliers or creditors.Explanation:When a business buys goods on credit, it must keep a separate record for each supplier.These individual supplier accounts are maintained in a purchase ledger.This ledger is also known as the bought ledger or accounts payable ledger.The sales ledger, on the other hand, contains the accounts of customers.Hence, the correct option is the purchase ledger.Answer:A. purchase ledger