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
"Wickham striae " are seen in 
Select and explain. 
A. Psoriasis, B. Pityriasis rubra pilaris, C. Lichen planus, D. Lichen nitidus
C: Lichen planus
Answer: C: Lichen planus 
Explanation: Wickham striae are the whitish criss cross streaks typically seen in oral Lichen planus.