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
Irradiation can be used to sterilize A/E ? 
Select and explain. 
A. Bone graft, B. Suture, C. Aificial tissue graft, D. Bronchoscope
D: Bronchoscope
Answer: D: Bronchoscope 
Explanation: Ans. is 'd' i.e., Bronchoscope Endoscops are sterilized by chemical methods :? i) Rigid endoscope ---> Autoclave ii) Flexible endoscope --> Glutaraldehyde Bone & tissue graft, and cat gut suture are sterilized by ionizing radiation ('y - rays)