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: Pathology
Which does of radiation given in fraction over sereral weeks will causes radiation nephritis beginning six months of more - 
Select and explain. 
A. 1000 rads, B. 1500 rads, C. 2300 rads, D. 4200 rads
C: 2300 rads
Answer: C: 2300 rads 
Explanation: Ans. is 'c' i.e., 2300 rads o Exposure to 2300 to 2800 rad can cause radiation induced kidney damage.