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: Microbiology
[{'content': 'True about pneumococci is except: \nSelect and explain. \nA. Optochin S, B. Bile solubility, C. Inulin fermentation, D. Catalase positive', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Catalase positive', 'role': 'assistant'}]