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: Pathology
[{'content': "Other than pemphigus, Nikolsky's sign is positive in: \nSelect and explain. \nA. Familial benign chronic pemphigus, B. Hailey- Hailey disease, C. Epidermolysis bullosa, D. All of the above", 'role': 'user'}, {'content': "Answer: D \nExplanation: “Nikolsky's sign” is positive in:\n\nPemphigus.\nFamilial benign chronic pemphigus (hailey-hailey disease).\nRecessive dystrophic epidermolysis bullosa .", 'role': 'assistant'}]