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': 'Bumper fracture is: Rohtak 06 \nSelect and explain. \nA. Primary impact injury, B. Secondary impact injury, C. Teiary impact injury, D. Secondary injury', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Primary impact injury', 'role': 'assistant'}]