Final answer:
Accounts payable is the current liability according to the revised Schedule III. Property, plant, and equipment is a long-term asset, long-term debt is a liability but not current, and retained earnings is part of shareholders' equity.
Step-by-step explanation:
According to the revised Schedule III, the item that is considered a current liability is 1) Accounts payable. Current liabilities are debts or obligations that are due to be settled within one fiscal year or the operating cycle, whichever is longer. Examples of current liabilities include accounts payable, short-term loans, dividends payable, and accrued expenses.
Property, plant, and equipment are classified as long-term assets, not liabilities. Long-term debt is a liability, but it is not due within the short-term period; hence, it is not classified as a current liability. Retained earnings is a part of shareholders' equity and not a liability at all.