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: Surgery
[{'content': 'Following are the normal features in temporomandibular joint except \nSelect and explain. \nA. Joint sound, B. Pain while opening the mouth, C. Deviation of the mouth in opposite while opening the mouth in eccentric movements, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]