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': 'Nikolsky sign is seen in - \nSelect and explain. \nA. Pemphigus vulgaris, B. Herpes zoster, C. Herpes simlex, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D. i.e. All', 'role': 'assistant'}]