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
[{'content': 'Zinc is essential for? \nSelect and explain. \nA. Tyrosinase, B. Carbonic anhydrase, C. Hexokinase, D. Oxidoreductase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tyrosinase requires copper Carbonic anhydrase requires zinc Hexokinase requires magnesium Oxido reductase requires NAD/ NADP Ref : Biochemistry by U. Satyanarayana 3rd edition Pgno : 419', 'role': 'assistant'}]