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': 'Preauricular pain, grating sensation and partial trismus are the symptoms of \nSelect and explain. \nA. TMJ fibrous ankylosis, B. TMJ bony ankylosis, C. TMJ pain dysfurction symdnome, D. Ear infection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]