This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vestibulobullous disorders, Subject name: Dental
[{'content': "Acantholysis is seen in all except \nSelect and explain. \nA. Pemphigus vulgaris, B. Darrier's disease, C. SSSS, D. Bullous pemphigoid", 'role': 'user'}, {'content': "Answer: D \nExplanation: Acantholysis seen in diseases such as pemphigus vulgaris, pemphigus foliaceous,SSSS, Dariers disease. It is absent in bullous pemphigoid, making it useful for differential diagnosis. page no.110.Reference IADVL's concise textbook of dermatology", 'role': 'assistant'}]