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: Biochemistry
[{'content': 'Epimers of glucose ? \nSelect and explain. \nA. Mannose, B. Glyceraldehyde, C. Fructose, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Mannose Repeat from previous sessions. See expalanation-13 of session-4.", 'role': 'assistant'}]