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': '"Wickham striae " are seen in \nSelect and explain. \nA. Psoriasis, B. Pityriasis rubra pilaris, C. Lichen planus, D. Lichen nitidus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Wickham striae\xa0are the whitish criss cross streaks typically seen in oral\xa0Lichen planus.', 'role': 'assistant'}]