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
Disposable syringes are sterilized by 
Select and explain. 
A. 2% glutaraldelyde, B. Autoclave, C. Hot air oven, D. Ionizing radiation
D: Ionizing radiation
Answer: D: Ionizing radiation 
Explanation: Disposable plastics eg : Rubber or plastic syringes infusion sets, catheters are sterilized by Ionizing radiation.