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
Dose of oseltamivir in a child aged 9 months is: 
Select and explain. 
A. 2mg/ kg twice daily for 5 days, B. 2.5 mg/ kg twice daily for 5 days, C. 3 mg/ kg twice daily for 5 days, D. 3.5 mg/ kg twice daily for 5 days
C: 3 mg/ kg twice daily for 5 days
Answer: C: 3 mg/ kg twice daily for 5 days 
Explanation: Age groups Recommended dose of oseltamivir 0 to 1 month 2mg/ kg twice daily for 5 days >1 month to 3 months 2.5mg/ kg twice daily for 5 days >3 months to 12 months 3mg/ kg twice daily for 5 days Ref: Park 21st edition, page 148 Chapter: Epidemiology in communicable diseases.