This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Gas pack is commonly used to grow: 
Select and explain. 
A. Pseudomonas aeruginosa, B. Clostridium tetani, C. Klebsiella, D. Treponema pallidum
A: Pseudomonas aeruginosa
Answer: A: Pseudomonas aeruginosa 
Explanation: Ans. A. Pseudomonas aeruginosaGas pak system is the most commonly used method for anaerobiosis as it is simple.It uses a sachet containing sodium bicarbonate and sodium borohydride which react chemically with O2 in presence of water, to produce H2 and CO2 .