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: Dental
[{'content': 'Which of the following feature differentiates P.vulgaris from P.Foliaceus? \nSelect and explain. \nA. Autoimmune disorder, B. Nikolsky sign positive, C. Fishnet appearance on DIF, D. Buccal mucosa involved', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Mucosa is involved only in P.vulgaris not in\xa0P.Foliaceous', 'role': 'assistant'}]