Identify the asset which can be easily converted into cash.

The correct answer is option 4- Marketable securities.

Marketable securities are the asset that can be easily converted into cash. All other are fixed asset.

Marketable securities- Marketable securities are short-term investments that can easily be converted into cash, usually within a year. These include stocks, bonds, or treasury bills that are actively traded on financial markets. It is very liquid; easily converted to cash in the short term.