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
Q fever is caused by - 
Select and explain. 
A. Pseudomonas, B. Francisella, C. Coxiella burnetii, D. Rickettsia typhi
C: Coxiella burnetii
Answer: C: Coxiella burnetii 
Explanation: None