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: Social & Preventive Medicine
One gray of radiation is equal to – 
Select and explain. 
A. 1 rad, B. 10 rad, C. 100 rad, D. 1000 rad
C: 100 rad
Answer: C: 100 rad 
Explanation: None