Correct Answer - A
An anzyme molecule may contain a non protein component known as a prosthetic group. The prosthetic group which is covalently attached with the enzyme molecule is known as cofactor while those prosthetic groups which get attached to the enzyme at the time of reaction are known as coenzyme. Moreover, cofactors that are orgainc molecules are called conezymes.
The protein part of an enzyme without its cofactor is called apoenzyme while an enzyme in a combined form with its cofactor is called a holoenzyme.
