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': 'In pemphigus vulgaris, antibodies are present against \nSelect and explain. \nA. Basement membrane, B. Intercellular substance, C. Cell nucleus, D. Keratin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Intercellular substance', 'role': 'assistant'}]