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': 'Which of the following are enantiomers? \nSelect and explain. \nA. D-glucose and L-glucose, B. D-galactose and L-glucose, C. D-glucose and L-glucose, D. D-glucose and D-mannose', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Enantiomers are mirror images of each other. D and L isomers are enantiomers.', 'role': 'assistant'}]