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': 'Occupational Radiation Dose units - (yearly limits) as given by ICRP are \nSelect and explain. \nA. 5 mSv per year and 10 mSV in 5 yr period (cumulative), B. 50 mSv per year and 100 mSv in 5 yr period (cumulative), C. 500 mSv per year and 2500 mSv in 5 yr (cumulative), D. 5000 mSv per year and 5 Sv in 5 yr (cumulative)', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]