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
Occupational Radiation Dose units - (yearly limits) as given by ICRP are 
Select and explain. 
A. 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)
B: 50 mSv per year and 100 mSv in 5 yr period (cumulative)
Answer: B: 50 mSv per year and 100 mSv in 5 yr period (cumulative) 
Explanation: None