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': 'All of the following may lead to plaque formation except – \nSelect and explain. \nA. Psoriasis, B. Lichen planus, C. Pityriasis rosea, D. Pemphigus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Papulosquamous disorder results in papules or plaque.', 'role': 'assistant'}]