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': 'Acantholysis is seen in all of the following except: \nSelect and explain. \nA. Pemphigus, B. Bullous pemphigoid, C. Steven- Johnson syndrome, D. Toxic epidermonecrolysis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Intercellular substance', 'role': 'assistant'}]