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
Compressed air is used to fire lead slugs in - 
Select and explain. 
A. Automatic pistol, B. Revolver, C. Air gun, D. Shot gun
C: Air gun
Answer: C: Air gun 
Explanation: Air pistol and air guns release lead shots or pellets which are propelled by air compressed in a cylinder.
In other weapons, projectiles are ejected by high pressure due to rapid formation expanding hot gases.