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
Which is caused by Rickettsia? 
Select and explain. 
A. Weil's disease, B. Rocky mountain spotted fever, C. Scrub typhus, D. Lymes disease
B: Rocky mountain spotted fever
Answer: B: Rocky mountain spotted fever 
Explanation: Ans. (b) Rocky mountain spotted fever Family rickettsiae includes six genera: - Rickettsia - Ehrlichia - Orientia - Anaplasma - Neorickettisa - Coxiella