What is the meaning of the idiom 'smell a rat'?

86.In each of the questions, four alternatives are given for the Idiom/Phrase. Choose the alternative which best expresses the meaning of the Idiom/Phraseand click the button corresponding to it. Smell a rat

ক

Detect bad smell

খ

Suspect a trick or deceit

গ

Misunderstand

ঘ

See hidden meaning

In each of the questions, four alternatives are given for the Idiom/Phrase. Choose the alternative which best expresses the meaning of the Idiom/Phraseand click the button corresponding to it. Smell a rat

ক

Suspect something wrong

খ

Smell a burned rat

গ

Smell a rotten rat

ঘ

Smell something right

A student wanted to keep a pet rat. He kept it inside a closed cage and found that the rat died the next day. Select the reason behind the death of the rat.

ক

It did not get the space to move

খ

It did not get sunlight to grow

গ

It did not get air to breathe

ঘ

It did not get food to eat

After a portion of a rat's brain is destroyed, a scientist records dramatic weight gain in the rat. The portion of the rat's brain which was destroyed is most likely

ক

the hippocampus

খ

the hypothalamus

গ

the corpus callosum

ঘ

the angular gyrus

To Smell the rat ( Choose the one which best express the meaning of the given idiom)

ক

To detect a bad smell

খ

To misunderstand

গ

To suspect a trick or deceit

ঘ

To see hidden meaning

Choose the one which best expresses the meaning of the given IDIOM : to smell a rat

ক

To detect bad smell

খ

To misunderstand

গ

To suspect a trick of deceit

ঘ

To see hidden meaning

Choose the one which best expresses the meaning of the given idiom : To smell a rat.

ক

To mis understand

খ

To detect bad smell