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': 'Regarding Lichen Planus all are true, except : \nSelect and explain. \nA. Hypopigmentation in most residual disease, B. Lymphatic infiltration in supradermal layer, C. Itchy polygonal, purple papule, D. Skin, hair and oral mucosa commonly involved', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Hypopigmentation in residual disease', 'role': 'assistant'}]