Which of the following is not a coenzyme?

Statement $P$: Coenzymes are larger molecules compared to the protein part of enzymes.
Statement $Q$: Since the enzyme is inactive without the coenzyme,it forms the active site.

$.........$ is a cofactor for the proteolytic enzyme carboxypeptidase.

An organic substance bound to an enzyme and essential for its activity is called

The presence of ......... is required for the activity of carbonic anhydrase.

Consider the following statements:
$(A)$ Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group.
$(B)$ $A$ complete catalytic active enzyme with its bound prosthetic group is called apoenzyme.
Select the correct option.