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': 'The following are features of pneumococcus except- \nSelect and explain. \nA. Bile insolubility, B. Optochin sensitivity, C. Gram positive, D. Encapsulated', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Bile insolubility", 'role': 'assistant'}]