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: Pathology
[{'content': "The caries of enamel surface leads to accentuation of? \nSelect and explain. \nA. Incremental lines of retzius, B. Perikymata, C. Imbrication lines of pickerill, D. Wickham's striae", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]