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': 'Which of the following is a subepidermalvesiculobullous disorder? \nSelect and explain. \nA. Pemphigus vulgaris, B. Bullous pemphigoid, C. Pemphigus vegetans, D. Pemphigus erythematosus', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Bullous pemphigoid", 'role': 'assistant'}]