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': 'Bullet that leaves a visible mark in its flight so that person can see the path is: AI 10 \nSelect and explain. \nA. Tandem bullet, B. Tracer bullet, C. Dum-dum bullet, D. Incendiary bullet', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Tracer bullet', 'role': 'assistant'}]