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
Plasma sterilization acuracy is assessed by using - 
Select and explain. 
A. Bacillus subtilis, B. Bacillus stearothermophilus, C. Staphylococcus aureus, D. Clostridium tetani
B: Bacillus stearothermophilus
Answer: B: Bacillus stearothermophilus 
Explanation: None