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
Which of the following are epimers 
Select and explain. 
A. Glucose and Mannose, B. Galactose and mannose, C. Glucose and fructose, D. Fructose and Glucose
A: Glucose and Mannose
Answer: A: Glucose and Mannose 
Explanation: → 2nd epimer of glucose is mannose
→ 4th epimer of glucose is Galactose.