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': "Which is caused by Rickettsia: \nSelect and explain. \nA. Weil's disease, B. Rocky mountain spotted fever, C. Scrub typhus, D. Lymes disease", 'role': 'user'}, {'content': "Answer: B \nExplanation: Option 1 - Weil's disease is caused by Leptospira. Option 2 - Rocky mountain spotted fever is caused by R. rickettsia and transmitted by tick. This tick is also known as dermacentor andersoni . Option 3 - Scrub typhus is caused by Orientia tsutsugamushi. Option 4 - Lymes disease is caused by Borrelia burgdorferi.", 'role': 'assistant'}]