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
Microaerophilic bacteria: 
Select and explain. 
A. Campylobacter, B. Vibrio cholera, C. Pseudomonas, D. Salmonella
A: Campylobacter
Answer: A: Campylobacter 
Explanation: Ans. (a) Campylobacter Microaerophilic organism are organisms that require oxygen to survive, but in concentration less than that present in atmosphere, i.e. less than 21%. Example include: - Treponema pallidum - Helicobacter pylori - Borrelia burgdorferi - Campylobacter