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': 'Bulkeley membrane is seen in : \nSelect and explain. \nA. Psoriasis, B. Pemphigus, C. Tinea, D. Pityriasis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Psoriasis', 'role': 'assistant'}]