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': '10% dextrose is: \nSelect and explain. \nA. Isotonic, B. Hypotonic, C. Hypertonic, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]