Select the most appropriate meaning of the given Idiom.

Buy a lemon 

To buy something that is worthless

The most appropriate meaning of the idiom "buy a lemon" is to buy something that is worthless.

The other options are incorrect.

• "Wear fashionable clothing" is not the same as buy a lemon. Wearing fashionable clothing is simply dressing in a way that is stylish and trendy.
• "The ability to know what's happening" is not the same as buy a lemon. Having the ability to know what's happening is called being perceptive or having foresight.
• "To not complain" is not the same as buy a lemon. Not complaining is simply being patient and understanding.

The idiom "buy a lemon" comes from the fact that lemons are sour and not very good to eat. So, when someone buys a lemon, it means that they have bought something that is worthless or not very good. For example, someone might say that they bought a lemon when they bought a used car that turned out to be a lot of trouble.