Select the most appropriate meaning of the given idiom.

Cool as a cucumber

Calm and composed 

The most appropriate meaning of the given idiom "cool as a cucumber" is (3) Calm and composed.

This idiom means that someone is very calm and relaxed, even in a stressful situation. It is often used to describe someone who is not easily flustered or upset.

For example, you might say that someone is cool as a cucumber before a job interview or a big test.

The other options do not fit the meaning of the idiom.

• Nervous and fidgety means that someone is feeling anxious and restless.
• Irritated and annoyed means that someone is feeling angry or displeased.
• Happy and excited means that someone is feeling joyful and enthusiastic.