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
ORS required during first 4 hours in a 20 kg child - 
Select and explain. 
A. 200-400 ml, B. 400-600 ml, C. 600-800 ml, D. 1200-2200 ml
D: 1200-2200 ml
Answer: D: 1200-2200 ml 
Explanation: None