From the given options, select the one which most correctly explains the given expression:

"To smell a rat"

To suspect a trick or a deceit

"To smell a rat" most correctly explains the expression: To suspect a trick or a deceit. (Option 3)

Explanation: This idiom is used when someone senses or becomes suspicious of dishonesty, deception, or trickery in a situation. It implies a feeling that something is not quite right or that there may be an ulterior motive.

To spot rats in a dark room: This option does not accurately explain the expression. "To smell a rat" is an idiom and does not involve literal rat detection.

To misunderstand a speaker: This option does not accurately explain the expression. "To smell a rat" is more about suspecting deception or trickery, not necessarily misunderstanding someone.

• To get confused: This option does not accurately explain the expression. "To smell a rat" is not about confusion but about having suspicions or doubts regarding the truthfulness of a situation.