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: Radiology
[{'content': 'How much radiation dose is needed for permanent testicular sterilization in normal male: March 2013 (f) \nSelect and explain. \nA. 0-5 Gy, B. 6-10 Gy, C. 11-15 Gy, D. 16-20 Gy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. 6-10 Gy', 'role': 'assistant'}]