Answer: Marketable securities
Explanation: Marketable securities are shares and bonds that can be easily sold on the market due to the demand for them by investors. When in need of cash, they can be converted to monetary value without any considerable loss.
In contrast, inventories are not as liquid as they require time to convert to money. Accounts payable and Accounts receivable are the same and may even never be converted to cash in which case they will be written off as bad debts.