Which of the following accounts may have a debit or credit balance?

Answer: Option D

A Loan account may have either a debit or credit balance depending on its nature and position in the books.

If the business has taken a loan, it represents a liability and will have a credit balance.

If the business has given a loan to others, it becomes an asset and will show a debit balance.

On the other hand, accounts like Discount Received and Sales generally have credit balances, while Trade Expenses typically has a debit balance only.

Hence, only the Loan account can have both debit and credit balances.