Which among the following is NOT the current asset?

Option 1 -> Marketable securities are short-term investments that can be quickly converted to cash within a year, qualifying as current assets. Option 2 -> Advances received from customers represent money received before delivering goods/services, creating an obligation to fulfill the order, making it a current liability, not an asset. Option 3 -> Bills receivable are formal written promises where customers owe money to the business, representing amounts to be collected within a short period, hence current assets. Option 4 -> Debtors (accounts receivable) are amounts owed by customers for credit sales, expected to be collected within the operating cycle, making them current assets. Hence, Option 2: Advances received from customers -> This represents money received in advance from customers before goods or services are delivered, which creates a liability (obligation) for the company to fulfill the order in the future, not an asset. It appears on the liabilities side of the balance sheet as "Unearned Revenue" or "Deferred Revenue" -> correct