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': 'Twisting force cause: \nSelect and explain. \nA. Comminuted fracture, B. Spiral fracture, C. Oblique fracture, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A direct blow usually causes a transverse fracture and damage to the overlying skin\nCrushing is more likely to cause a comminuted fracture.\nTwisting causes spiral fracture.\nCompression causes a short oblique fracture.\nBending results in fracture with a triangular butterfly fragment.', 'role': 'assistant'}]