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
Sterilization control used in membrane filters is 
Select and explain. 
A. B pumilis, B. B stereo thermophilus, C. C tetani, D. Brevundimonas diminuta
D: Brevundimonas diminuta
Answer: D: Brevundimonas diminuta 
Explanation: Sterilization control for membrane filters is Brevundimonas diminuta and sarratia marcescens.