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: Skin
[{'content': 'Features of lichen planus are \nSelect and explain. \nA. Pruritis, B. Purple color, C. Papule, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. Pruritus, B i.e. Purple, C i.e. Papule', 'role': 'assistant'}]