From the given options, choose the one which gives the correct meaning for the expression

To smell a rat

To suspect a trick or deceit

The correct answer is > To suspect a trick or deceit.

The idiom to smell a rat means to suspect that something is wrong or that someone is trying to deceive you. It is often used when someone has a gut feeling that something is not right, but they cannot quite put their finger on it. In the sentence, the speaker is saying that they smell a rat, which means that they suspect that something is wrong with the situation. This is why the idiom to smell a rat is used in this context.

The other options are incorrect.

• To discover a new galaxy is not correct because the idiom to smell a rat does not refer to discovering new things.
• To have selfish motives is not correct because the idiom to smell a rat does not refer to selfishness.
• To serves as delicious dish is not correct because the idiom to smell a rat does not refer to food.