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': 'Crescent shaped abrasion is seen in injury with: AFMC 12 \nSelect and explain. \nA. Wood cane, B. Nail scratch, C. Bicycle chain, D. Ligature', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Nail scratch', 'role': 'assistant'}]