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': "Isotonic solution which supplies calories but not electrolytes: \nSelect and explain. \nA. 5% dextrose., B. 0.9% Nacl solution., C. Ringer's Lactate solution., D. Darrow's solution.", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]