This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Dental
[{'content': 'True about pemphigus vulgaris A/E: \nSelect and explain. \nA. Subepidermal, B. Autoimmune disease, C. Tzanck smear shows acanthoyltic cells, D. Antibody are formed against desmogleins', 'role': 'user'}, {'content': 'Answer: A \nExplanation: i.e. Subepidermal Ref : Thomas b Habif 6th Ed.', 'role': 'assistant'}]