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
All are not true for cultivation of anaerobic organisms except 
Select and explain. 
A. Incubator, B. anaerobic jar, C. Refrigerator, D. centrifuge
B: anaerobic jar
Answer: B: anaerobic jar 
Explanation: None