What is the meaning of the idiom/proverb "To smell a rat"?

Review the verified answer and explanation for this PPSC Punjab Public Service Commission past-paper question on CampusFin.

What is the meaning of the idiom/proverb "To smell a rat"? Answer: To suspect a trick or detect

To "smell a rat" means to suspect that something is wrong, dishonest, or not what it appears to be. It indicates a feeling of suspicion that someone is trying to deceive you or that foul play is involved.

Question context

This question is part of 🗣️ Verbal Ability within the broader 🧠 Aptitude Mastery subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.