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
[{'content': 'Which is associated with shotgun along : \nSelect and explain. \nA. Gun powder, B. Primer, C. Projectile, D. Wads', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Wads', 'role': 'assistant'}]