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: Unknown
[{'content': 'The muzzle velocity of given firearm is : - \nSelect and explain. \nA. 150 m/s, B. 300 m/s, C. 360 m/s, D. 1500 m/s.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The revolver, which tends to have a low muzzle velocity of 150 m/s, is a short barreled weapon with its ammunition held in a metal drum, which rotates each time the trigger is released.\nThe muzzle velocity of pistols varies between 300 and 360 m/s.\nThe rifle is a long-barreled shoulder weapon capable of firing bullets with velocities up to 1500 m/s.\nReference – Clinical Forensic Medicine by Margaret M. Stark - 144', 'role': 'assistant'}]