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
[{'content': 'Cold sterilization is done by: \nSelect and explain. \nA. Steam, B. Ionizing radiation, C. Infrared, D. UV', 'role': 'user'}, {'content': "Answer: B \nExplanation: 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.", 'role': 'assistant'}]