This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune skin disorders, Subject name: Dental
[{'content': 'Rarest variety of Pemphigus \nSelect and explain. \nA. Pemphigus vulgaris, B. Pemphigus foliaceous, C. Pemphigus vegetans, D. Pemphigus erythematosus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pemphigus vegetans is a localized form of pemphigus vulgaris. in which there is a localized vegetating papillomatous response. The eroded areas do not heal like usual but form papillomatous growth and vegetation. Accounts for 1-2% of pemphigus cases and is a relatively benign variant of pemphigus vulgaris. Ref Harrison20th edition pg 2435', 'role': 'assistant'}]