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': 'Which of the following is non-motile: \nSelect and explain. \nA. Pseudomonas aeruginosa, B. Burkholderia mallei, C. Burkholderia pseudomallei, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is. 'b' i. e., Burkholderia mallei", 'role': 'assistant'}]