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
The manufacturing unit of surgical needle & sutures are sterilized by? 
Select and explain. 
A. Gamma-Rays, B. X-Rays, C. Autoclaving, D. Boiling
A: Gamma-Rays
Answer: A: Gamma-Rays 
Explanation: None