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
1 Sv is 
Select and explain. 
A. 100 rads, B. 100 rem, C. Both, D. None
B: 100 rem
Answer: B: 100 rem 
Explanation: 1 Gy = 100 rads
1 Sv = 100 rem