The correct answer is B. Real account.
A real account is an account that represents an asset, liability, or equity of a company. Office equipment is an asset, so its account is a real account.
A nominal account is an account that represents revenue, expense, or gain/loss of a company. These accounts are closed at the end of the accounting period and their balances are transferred to the retained earnings account.
A cash account is a real account that represents the cash on hand and in the bank of a company.
A capital account is a real account that represents the owner’s equity in a company.