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
Wickehm's stria seen in – 
Select and explain. 
A. Lichen niditus, B. Lichenoid eruption, C. Lichen striates, D. Lichen planus
D: Lichen planus
Answer: D: Lichen planus 
Explanation: The surface of lesion of lichen planus has white streaks when examined under magnifying lens → Wickham's stria.