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 smooth bored weapon - \nSelect and explain. \nA. Rifle, B. Shotgun, C. Revolver, D. Pistal', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Smooth bored weapons Shotgun, muskets, and muzzle loaders.\nRifled weapons : Rifles, pistols, and revolvers.', 'role': 'assistant'}]