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: Pharmacology
The loading dose of aminophylline is : 
Select and explain. 
A. 50–75 mg/kg, B. 0.5–1 mg/kg, C. 2–3.5 mg/kg, D. 5–6 mg/kg
D: 5–6 mg/kg
Answer: D: 5–6 mg/kg 
Explanation: Aminophylline is administered in a dose of 5-7 mg/kg slow intravenous infusion. In children, the dose required is 7.5 mg/kg.