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': 'Not an aldose sugar \nSelect and explain. \nA. Erythrose, B. Glucose, C. Fructose, D. Galactose', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Aldose sugars glyceraldehyde, erythrose, arabinose, xylose, ribose, glucose, galactose, mannoseRef: DM Vasudevan, 7th edition, page no: 76', 'role': 'assistant'}]