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
True about X-rays is? 
Select and explain. 
A. X-rays do not damage structure of all kind of biologic cells, B. In adult cell the effect of radiation are short term and reversible, C. Only central rays are harmful to patients, D. None of the above
B: In adult cell the effect of radiation are short term and reversible
Answer: B: In adult cell the effect of radiation are short term and reversible 
Explanation: None