The correct answer is: A. Current assets - Working capital

Current liabilities are a company's short-term debts and obligations that are due within one year. They include accounts payable, short-term notes payable, and current portion of long-term debt.

Working capital is the difference between a company's current assets and its current liabilities. It is a measure of a company's liquidity and ability to meet its short-term obligations.

Therefore, current liabilities are equal to current assets minus working capital.

Option B is incorrect because working capital is a measure of a company's liquidity and ability to meet its short-term obligations, not its current liabilities.

Option C is incorrect because current assets and working capital are two different things. Current assets are a company's short-term assets, while working capital is the difference between a company's current assets and its current liabilities.

Option D is incorrect because current liabilities are not equal to none of the above. They are equal to current assets minus working capital.