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: Medicine
[{'content': 'Which is not true about legionnaire pneumonia: \nSelect and explain. \nA. Seen mainly in immunocompromised person, B. Erythromycin is drug of choice, C. Common in patients with hairy cell leukemia, D. Smoking and alcohol are risk factor.', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is B (Erythromycin is the drug of choice): 'Azithromycin, Clarithromycin or a fluoroquinolone (eg Levofloxacin) and not erythromycin is the drug of choice for treatment legionellosis because of their excellent intracellular penetration and in vitro activity as well as desirable pharmacokinetic propeies that permit oral administration and once or twice daily dosing - Agent Disease First choice Second choice Third choice Legionella Legionnaire's disease Azithromycin Erythromycin * Trimethoprim penumophilia Fluoroquinolone sulfomethoxazole * Doxycycline", 'role': 'assistant'}]