This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Bacterial Diseases in Children, Subject name: Pediatrics
[{'content': 'Drug of choice for peussis is? \nSelect and explain. \nA. Penicillin, B. Ceftriaxone, C. Erythromycin, D. Azithromycin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Macrolides are preferred agents in Peussis Due to increased risk of infantile hyperophic pyloric stenosis in neonates treated with oral erythromycin, Azithromycin is the preferred agent in all age groups.', 'role': 'assistant'}]