General utility functions are services provided by banks to customers and the public that go beyond basic deposit and lending activities. These include providing safe deposit lockers, issuing traveler's checks, and dealing in foreign exchange, which assist customers in their daily financial management and security needs.

Interest rate is the cost of borrowing money, expressed as a percentage of the principal amount. From the borrower's viewpoint, it represents the expense incurred for the privilege of using the lender's capital over a specific duration. It is the fundamental price of credit in financial markets.

A bank loan is a financial arrangement where a bank provides a specific amount of money to a borrower for a fixed duration at an agreed interest rate. This differs from an overdraft, which is a flexible facility allowing a customer to withdraw more than their current account balance up to a limit.

Electronic funds transfer (EFT) refers to the digital movement of money between accounts. While checks and paper documents are traditional methods, 'credit' is a financial concept or facility rather than a specific instrument of transfer, making it the outlier in this context.

A check involves three primary parties: the drawer (payer), the drawee (the bank), and the payee (the person to whom payment is made). While a seller might be the payee, 'seller' is a commercial role rather than a formal party defined in the legal instrument of a check.

A three-column cash book is a specialized journal that records cash receipts and payments, bank deposits and withdrawals, and cash discounts allowed or received, all within a single integrated record-keeping format.

A contra entry occurs when a transaction affects both the cash and bank columns simultaneously. Examples include depositing cash into the bank or withdrawing cash from the bank for office use. These entries are marked with a 'C' in the ledger folio column.

A contra entry occurs when a transaction affects both the cash and bank columns of a cash book simultaneously. Examples include depositing cash into the bank or withdrawing cash from the bank for office use. Because these transactions involve the movement of funds between the business's own cash and bank accounts, they are recorded on both sides of the cash book and marked with a 'C' to indicate they do not affect external parties.

A three-column cash book includes columns for cash, bank, and discount. The bank column can show a debit balance (representing funds in the bank) or a credit balance (representing a bank overdraft). Conversely, the cash column can never have a credit balance because one cannot spend more physical cash than is on hand.

Discount received is a gain associated with the payment of creditors. In a triple-column cash book, the discount received column is placed on the credit (payment) side, corresponding to the entry where the cash payment to the creditor is recorded. Note: The provided answer 'Payments' is correct in this context.