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': 'Commonest/rarest veriety of Pemphigus? \nSelect and explain. \nA. Pemphigus vulgaris/vegetans, B. Pemphigus vegetans/vulgaris, C. Pemphigus fliaceus/erythematosis, D. Pemphigus erythematosia/foliaceous', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Pemphigus vulgaris/vegetans', 'role': 'assistant'}]