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
[{'content': 'Treatment of dehydrated child patient is: \nSelect and explain. \nA. 0.9% normal saline, B. 5% dextrose, C. 10% dextrose, D. 50% dextrose', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]