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
[{'content': 'Which of the following bacteria is classified as facultative anaerobe? \nSelect and explain. \nA. Pseudomonas, B. Bacteroides, C. Escherichia, D. Clostridium', 'role': 'user'}, {'content': "Answer: C \nExplanation: 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", 'role': 'assistant'}]