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': 'A elderly male patient presented with fever, chest pain and dry cough, sputum cultured on charcoal yeast medium, the organism is -( \nSelect and explain. \nA. H. influenzae, B. Moraxella caarrhalis, C. Legionella, D. Burkholderia cepacia', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Legionella . Buffered charcol, yeast extract (BCYE) agar is a selective media for legionella. . Fever, chest pain and dry cough in an elderly patient with culture positive on charcol yeast medium suggest the diagnosis of legionella infection.", 'role': 'assistant'}]