Chemistry · Macromolecules

Option C is correct.
Enzymes are proteins which help to catalyze the biochemical reaction. The enzyme has a protein part which is not active is known as apoenzyme. It gets activated by the addition of an organic or inorganic cofactor. The holoenzyme is defined as apoenzyme in combination with the cofactor.
A cofactor is a non-protein part of the enzyme. It can be metal ions or the organic chemical. The cofactors which are organic chemicals are known as a coenzyme. These are loosely attached to the apoenzyme. The tightly bound coenzymes are the prosthetic group.

Vitamins are organic compounds that are essential for various metabolic processes in the body. Some vitamins act as coenzymes, which means they can associate with enzymes to help them perform their catalytic functions. Coenzymes are a type of cofactor, and they often participate in enzyme reactions, assisting in the conversion of substrates to products. 

DNA (deoxyribonucleic acid) is a molecule that contains the genetic instructions for the development, functioning, growth, and reproduction of all living organisms. While DNA is a crucial component of cells, it is not typically considered a cofactor. Co-factors are additional molecules required for the proper functioning of certain enzymes. 

Enzymes are proteins which help to catalyze the biochemical reaction. The enzyme has a protein part which is not active is known as apoenzyme. It gets activated by the addition of an organic or inorganic cofactor. The holoenzyme is defined as apoenzyme in combination with the cofactor.
A cofactor is a non-protein part of the enzyme. It can be metal ions or the organic chemical. The cofactors which are organic chemicals are known as a coenzyme. These are loosely attached to the apoenzyme. The tightly bound coenzymes are the prosthetic group.

This option is not accurate. The non-protein part of a cofactor includes both organic and inorganic (metallic) molecules, such as coenzymes and metal ions.