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
Which is associated with shotgun along : 
Select and explain. 
A. Gun powder, B. Primer, C. Projectile, D. Wads
D: Wads
Answer: D: Wads 
Explanation: D i.e. Wads