Select the most appropriate meaning of the given idiom.
Acid test
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Definitive proof of truth or falsehood.
The meaning of the given idiom is:
Acid test - a test which really proves the value, quality or truth of something.
As the chosen option is the same as the meaning of the given idiom it will be correct.