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': 'Most common species of pseudomonas causing intravascular catheter related infections is ? \nSelect and explain. \nA. P. cepacia, B. P. aeruginosa, C. P. maltophilia, D. P. mallei', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pseudomonas aeruginosa is most troublesome agent of nosocomial infections', 'role': 'assistant'}]