Choose the odd one out.

The answer is C. SAT.

The other four options are all words that can be used as nouns to refer to animals. A rat is a small rodent, a cat is a small domesticated carnivorous mammal with soft fur, a mat is a piece of fabric or other material used for covering a floor or other surface, and a get is a garment worn by Jewish men.

The word “sat” is not a noun. It is a verb that means to rest or be seated.