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 enantiomers? 
Select and explain. 
A. D-glucose and L-glucose, B. D-galactose and L-glucose, C. D-glucose and L-glucose, D. D-glucose and D-mannose
A: D-glucose and L-glucose
Answer: A: D-glucose and L-glucose 
Explanation: Enantiomers are mirror images of each other. D and L isomers are enantiomers.