This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Special topics, Subject name: Forensic Medicine
Which is a smooth bored weapon 
Select and explain. 
A. Rifle, B. Shot gun, C. Revolver, D. Pistol
B: Shot gun
Answer: B: Shot gun 
Explanation: Shot gun These are single or double barrelled smooth bored weapons in which pellets are used as projectile. Shot guns may be muzzle loading or breech loading. It may be of single barrel or double barrel. In double barrel, the lower barrel is used for loading caridges. Ref: FORENSIC MEDICINE AND TOXICOLOGY DR PC IGNATIUS THIRD EDITION PAGE 137