This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
A 12 kg child with diarrhoea, fluid to be replaced in first 4 hours - 
Select and explain. 
A. 0-400ml, B. 400-800ml, C. 800-1200ml, D. 1200-1600ml
C: 800-1200ml
Answer: C: 800-1200ml 
Explanation: <p> 800-1200 ml. Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:226. <\p>