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: Medicine
Causative agent of Trench fever 
Select and explain. 
A. Coxiella burnetii, B. Bartonella Quintana, C. R. tsusugamushi, D. R. prowazekii
B: Bartonella Quintana
Answer: B: Bartonella Quintana 
Explanation: Q fever - Coxiella burnetii.
Trench fever - Bartonella Quintana.