Answer:
Enzymes.
Step-by-step explanation:
Protein is one of the main biomolecules present in the living organism and works as the main building block of the body. Proteins are the polymers of the amino acids.
Proteins are involved in formation of enzymes, clotting factor and other important metabolites of the body. One of the main function of protein is the formation of enzymes. Enzymes are all proteinaceous in nature except ribozyme.
Thus, the correct answer is option (b).