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: Pediatrics
Drug of choice for pertussis in children is 
Select and explain. 
A. Penicillin, B. Erythromycin, C. Ampicillin, D. Azithromycin
D: Azithromycin
Answer: D: Azithromycin 
Explanation: None