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': 'Lichen planus all are true except ? \nSelect and explain. \nA. Pruritic lesion, B. Involves nails, C. Involves mucus membranes, D. Steroid is not used in treatment', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Steroid is not used in treatment", 'role': 'assistant'}]