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': 'The most common site of mandible fracture is \nSelect and explain. \nA. Condylar head, B. Condylar neck, C. Coronoid head, D. Coronoid neck', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]