This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Haemophilus, Yersinia, Spirochaetes, Ricketssia, Chlamydia, Mycoplasma and Miscellaneous Bacteria), Subject name: Microbiology
[{'content': 'Boutonneuse fever is caused by- \nSelect and explain. \nA. Rickettsia japonica, B. Rickettsia conorii, C. Rickettsia sibirica, D. Rickettsia australis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Boutonneuse fever (also called, fievre boutonneuse, Kenya tick typhus, Indian tick typhus, Marseilles fever, African tick-bite fever, or Astrakhan fever) is a fever as a result of a Rickettsial infection caused by the bacterium Rickettsia conorii Transmitted by the dog tick - Rhipicephalus sanguineus.', 'role': 'assistant'}]