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': 'Abrasion collar is seen in: September 2006 \nSelect and explain. \nA. Abrasions over neck, B. Bullet injury, C. Punctured wounds, D. Lacerated wounds', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Bullet injury Abraded margin (Abrasion collar, Marginal abrasion, Contusion ring, Abrasion ring) occurs due to Forward motion of bullet indenting the skin and abrading the margin of entry wound. Grease or di collar is a black coloured ring lining the entry point of bullet and is sharply outlined', 'role': 'assistant'}]