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
In `Hot air oven' for holding period of one hour, the temperature required is - 
Select and explain. 
A. 100°C, B. 120°C, C. 140°C, D. 160°C
D: 160°C
Answer: D: 160°C 
Explanation: None