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': 'The effective range of shot gun is : \nSelect and explain. \nA. 10 to 15 yards, B. 20 to 30 yards, C. 30 to 40 yards, D. 60 to 80 yards', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. 30 - 40 yards', 'role': 'assistant'}]