This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Gamma radiations are used for sterilizing? \nSelect and explain. \nA. Syringes, B. Cystoscopes, C. Dressing aprons, D. Metal instruments', 'role': 'user'}, {'content': "Answer: A \nExplanation: IONISING RADIATION: commercial plants use gamma radiations for sterilizing items like plastics, syringes, swabs, catheters, animal feeds, cardboards, oils, grease, fabrics and metal foils. REF:Ananthanarayan and Panicker's Textbook ofMicrobiology 8thEdition pg", 'role': 'assistant'}]