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
[{'content': 'Seven sheathed flagella is seen in - \nSelect and explain. \nA. V. cholera, B. H. pylori, C. Pseudomonas aeruginosa, D. Spirochetes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]