This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'Which of the following is Aldosugar? \nSelect and explain. \nA. Fructose, B. Erythrulose, C. Glucose, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Repeated question', 'role': 'assistant'}]