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
Choking is constricting device within the barrel at the muzzle end of - 
Select and explain. 
A. Revolver, B. 303 rifle, C. Shot gun, D. Semiautomatic pistol
C: Shot gun
Answer: C: Shot gun 
Explanation: Choking is done in shot gun at muzzle end to present dispersions of pellets.