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: Social & Preventive Medicine
Treatment for pertussis contacts children for 
Select and explain. 
A. Prophylactic antibiotic for 11 days, B. Prophylactic antibiotic for 14 days, C. Prophylactic antibiotic for 12 days, D. Prophylactic antibiotic for 10 days
D: Prophylactic antibiotic for 10 days
Answer: D: Prophylactic antibiotic for 10 days 
Explanation: None