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
Maximum dose of radiation per year in a human which is safe 
Select and explain. 
A. 1 rads, B. 5 rads, C. 10 rads, D. 20 rads
B: 5 rads
Answer: B: 5 rads 
Explanation: B i.e. 5 rads Amount of radiation received from out space = 0.1 rad/yearQ Additional permissible dose =