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: Dental
[{'content': "Wickehm's stria seen in – \nSelect and explain. \nA. Lichen niditus, B. Lichenoid eruption, C. Lichen striates, D. Lichen planus", 'role': 'user'}, {'content': "Answer: D \nExplanation: The surface of lesion of lichen planus has white streaks when examined under magnifying lens → Wickham's stria.", 'role': 'assistant'}]