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
Bullet that leaves a visible mark in its flight so that person can see the path is: AI 10 
Select and explain. 
A. Tandem bullet, B. Tracer bullet, C. Dum-dum bullet, D. Incendiary bullet
B: Tracer bullet
Answer: B: Tracer bullet 
Explanation: Ans. Tracer bullet