This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Zinc is a cofactor for which of the following enzymes? 
Select and explain. 
A. Hexokinase, B. Cytochrome coxidase, C. Carbonic anhydrase, D. Xanthine oxidase
C: Carbonic anhydrase
Answer: C: Carbonic anhydrase 
Explanation: Zinc acts as cofactor for many enzymes :

Carbonic anhydrase
Alcohol dehydrogenase
Alkaline phosphatase
Lactate dehydrogenase
ALA dehydratase
Carboxypeptidase.