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': 'Extensive abrasions are found all over the body of a pedestrian lying by the road side. What is the likely cause ? \nSelect and explain. \nA. Primary Impact Injury, B. Secondary Impact Injury, C. Secondary Injury, D. Postmortem artifact', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In secondary injury, when the body is rolled over after the impact, the skin may show abrasions of more than two surfaces (front, back and sides).', 'role': 'assistant'}]