Correct option is A
Option (a) is the correct meaning of the given idiom.
Given Idiom: "A fish out of water" refers to a situation where someone feels uncomfortable or out of place because the surroundings are unfamiliar.
Example: When Riya joined a new school, she felt like a fish out of water among strangers.
Other related idioms and their meanings:
· "Out of one’s depth" – Being in a situation too difficult to handle.
· "Not my cup of tea" – Something one does not like or enjoy.