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 does not has a known animal reservoir \nSelect and explain. \nA. Brucella melitensis, B. Bordettela peussis, C. Pasturella multocida, D. Francisella tularensis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is. 'b' i. e., Bordettela peussis", 'role': 'assistant'}]