This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
The loading dose of Aminophylline is 
Select and explain. 
A. 50-75mg/kg, B. O. 5-1mg/kg, C. 2-3.5mg /kg, D. 5-6mg/kg
D: 5-6mg/kg
Answer: D: 5-6mg/kg 
Explanation: Refer KDT 6/e p 221 Aminophylline IA admistered I'm a dose of 5-7mg/kg slow intravenous infusion. In children, dose required is 7.5mg/kg