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: Surgery
Treatment of dehydrated child patient is: 
Select and explain. 
A. 0.9% normal saline, B. 5% dextrose, C. 10% dextrose, D. 50% dextrose
B: 5% dextrose
Answer: B: 5% dextrose 
Explanation: None