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
An autoclave sterilizes dental instruments by causing which of the following? 
Select and explain. 
A. Coagulation and Denaturation of proteins., B. Oxidative damage., C. Precipitation of nucleic acids., D. Disruption of cell membranes.
A: Coagulation and Denaturation of proteins.
Answer: A: Coagulation and Denaturation of proteins. 
Explanation: Autoclave functions by causing coagulation and denaturation of proteins. They are effective against spores.