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
[{'content': 'Zinc is a cofactor for which of the following enzymes? \nSelect and explain. \nA. Hexokinase, B. Cytochrome coxidase, C. Carbonic anhydrase, D. Xanthine oxidase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Zinc acts as cofactor for many enzymes :\n\nCarbonic anhydrase\nAlcohol dehydrogenase\nAlkaline phosphatase\nLactate dehydrogenase\nALA dehydratase\nCarboxypeptidase.', 'role': 'assistant'}]