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': 'Desquamative gingivitis represents oral manifestations of all of the following except: \nSelect and explain. \nA. Erosive lichen planus., B. Benign mucous membrane pemphigoid., C. Erythema multiformae., D. Pemphigus.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Desquamative gingivitis represents oral manifestations of various diseases like\n\nLichen planus (Erosive or atrophic form),\nCicatrial pemphigoid or Benign mucous membrane pemphigoid\npemphigus.', 'role': 'assistant'}]