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: Social & Preventive Medicine
[{'content': 'Trench fever is caused by, \nSelect and explain. \nA. Rickettsia prowazekii, B. Coxiella Burnetii, C. Bartonella quintana, D. Rickettsia akari', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]