Which of the following is an example of a current asset?

Current assets are assets that a company expects to convert into cash or use up within one year or one operating cycle, whichever is longer. Cash itself is the most liquid asset and serves as the primary indicator of a company's short-term financial health and liquidity. It can be easily used to pay off liabilities, invest in operations, or cover expenses.

Property, Plant, and Equipment and Long-term Investments, on the other hand, are categorized as non-current assets. These are typically held for more than a year for purposes such as production or investment, rather than being quickly converted into cash. Goodwill is an intangible asset that arises when a company acquires another business and pays a premium over its fair value. It does not qualify as a current asset because it does not convert into cash or provide liquidity within a short time frame.

Thus, cash is the prime example of a current asset, as it fits the definition of being readily available for use in the company's ongoing operations.