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': 'Tangentially directed injury may causes: \nSelect and explain. \nA. Through and through injury in scalp., B. Complex fracture., C. Horse shoe shaped fracture., D. Semicircle fracture.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A tangentially directed violence may secure a grip on the skull and lift it up producing a horse-shoe shaped fracture surrounding the calvarium.', 'role': 'assistant'}]