Some $B$ vitamins are known as:

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.

Which enzyme's activity is regulated by calcium as a cofactor?

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

The function of Vitamin $B_1$ is to ......

Which one is true for $ATP$?