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: Microbiology
Ionizing radiation commonly used for disinfection? 
Select and explain. 
A. UV rays, B. Infrared, C. X-rays, D. Gamma rays
D: Gamma rays
Answer: D: Gamma rays 
Explanation: Ans. is'd' i.e., Gamma rays There are 2 general types of radiation used for sterilization, ionizing radiation and non-ionizing radiation. Ionizing radiation is the use of sho wavelength, high-intensity radiation to destroy microorganisms. This radiation can come in the form of gamma or X-rays that react with DNA resulting in a damaged cell.