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': "When a patient's chin and mandible deviate to the right upon opening, which of the following is a possible cause? \nSelect and explain. \nA. Hyperplasia of the right condyle, B. Fracture of the left condyle, C. Ankylosis of the left condyle, D. Hypoplasia of the right condyle", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]