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 chioroquine at 4-8 year - 
Select and explain. 
A. 300 mg., B. 150 mg., C. 450mg, D. 600 mg.
A: 300 mg.
Answer: A: 300 mg. 
Explanation: None