This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Biochemistry
Zinc is essential for? 
Select and explain. 
A. Tyrosinase, B. Carbonic anhydrase, C. Hexokinase, D. Oxidoreductase
B: Carbonic anhydrase
Answer: B: Carbonic anhydrase 
Explanation: Tyrosinase requires copper Carbonic anhydrase requires zinc Hexokinase requires magnesium Oxido reductase requires NAD/ NADP Ref : Biochemistry by U. Satyanarayana 3rd edition Pgno : 419