This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology (Sterilization and Bacterial Genetics), Subject name: Microbiology
[{'content': 'Irradiation can be used to sterilize all except : \nSelect and explain. \nA. Bone graft, B. Suture, C. Aificial tissue graft, D. Bronchoscope', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Bronchoscopes are sterilized by glutaraldehyde (Cidex). Gamma rays are used for sterilization of pre-packed disposable items, sutures, IV cannulas, urinary catheter, contraceptive devices, bone or tissue grafts', 'role': 'assistant'}]