This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanisms of Enzyme Action, Subject name: Biochemistry
[{'content': 'Carbonic anhydrase is which type of enzyme - \nSelect and explain. \nA. Coenzyme, B. Metalloenzyme, C. Serine protease, D. Endopeptidase', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Metalloenzyme o The active site of carbonic anhydrase contains a zinc ion, they are therefore classified as metalloenzymes.", 'role': 'assistant'}]