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: Dental
Which is the ideal method of sterilization for snap a ray film holder? 
Select and explain. 
A. Hot air oven, B. Cannot be sterilized as it is plastic, C. Chemical sterilization, D. Autoclave
D: Autoclave
Answer: D: Autoclave 
Explanation: None