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': 'Oral dyskinesia may be caused by \nSelect and explain. \nA. Complete loss of teeth, B. TMJ ankylosis, C. Herpes simplex infection, D. Pemphigus vulgaris', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]