This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
Cold sterilization is done by: 
Select and explain. 
A. Steam, B. Ionizing radiation, C. Infrared, D. UV
B: Ionizing radiation
Answer: B: Ionizing radiation 
Explanation: Ref: Ananthanarayan's Microbiology, 8th ed. pg. 35* Cold sterilization is a process in which sterilization is carried out at low temperature with the help of chemicals, radiations, membranes.* Ionizing radiation such as X-rays, gamma rays and cosmic rays, cause no appreciable increase in temperature in this method, it is referred to as cold sterilization.