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: Forensic Medicine
[{'content': "Boxer's fracture is: MP 11 \nSelect and explain. \nA. Fracture of first metacarpal base, B. Fracture of fifth metacarpal neck, C. Fracture of third metacarpal neck, D. Fracture of first metacarpal neck", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Fracture of fifth metacarpal neck', 'role': 'assistant'}]