This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
Which of the following is used as a control during sterilization of ionizing radiations 
Select and explain. 
A. Bacillus stearothermophilus, B. Bacillus anthracis, C. Bacillus subtilis, D. Bacillus pumilus
D: Bacillus pumilus
Answer: D: Bacillus pumilus 
Explanation: Bacillus stearothermophilus - Moist heat ( Autoclave ), Bacillus anthracis causes anthraxBacillus subtilis - Dry heat ( Hot air oven)