Many co-enzymes are derivatives of which of the following?

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.

The major role of minor elements (trace elements) inside living organisms is to act as:

Thiamine is a kind of

What is the non-protein part associated with enzymes called?

Deficiency of this leads to loss of appetite,mental confusion,fatigue,and muscle wasting. It is . . . . . . .