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: Pharmacology
[{'content': "Treatment of choice for LegionnaEUR' aiere's disease is: \nSelect and explain. \nA. TC, B. Erythromycin, C. Penicillin, D. Streptomycin", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Erythromycin', 'role': 'assistant'}]