This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
Which of the following bacteria is classified as facultative anaerobe? 
Select and explain. 
A. Pseudomonas, B. Bacteroides, C. Escherichia, D. Clostridium
C: Escherichia
Answer: C: Escherichia 
Explanation: Facultative anaerobes which are ordinarily aerobic but can also grow in the absence of oxygen though less abundantly. Most bacteria of medical impoance are facultative anaerobes Other anaerobic: Clostridium, refer the image Ref: Ananthanarayan & paniker's Textbook of Microbiology 9th edition pg no:24