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': 'A patient presented with scarring alopecia, thinned nails, hypopigmented macular lesions over the trunk and oral mucosa. The diagnosis is \nSelect and explain. \nA. Psoriasis, B. Leprosy, C. Lichenplanus, D. Pemphigus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Lichen Planus', 'role': 'assistant'}]