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': 'True regarding non accidental traumatic fractures,all except: \nSelect and explain. \nA. Costochondral joint fracture, B. Sternal fracture, C. Parietal fracture, D. Metaphyseal corner fracture', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Parietal skull fractures are more suggestive of accidental injury.', 'role': 'assistant'}]