Select the most appropriate meaning of the given idiom.

An eye wash

A pretence

The most appropriate meaning of the idiom "an eye wash" is a pretence. It means something that is done only to make people think that something is being done, but is actually meaningless or ineffective.

The other options are not as appropriate.

• In writing means something that is written down.
• Avoid talking means to not talk about something.
• A rare event means something that happens infrequently.