This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rickettsial Diseases, Subject name: Social & Preventive Medicine
[{'content': 'Following is NOT caused by virus: \nSelect and explain. \nA. Rocky mountain spotted fever, B. KFD, C. Dengue, D. Yellow fever', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Rocky mountain spotted feverRef : K. Park 23rd ed. / 299-300Diseases, their causative agents and vectorsDiseaseCausative agentVectorRMSF (Rocky Mountain Spotted Fever)R. RickettsiiTickKyasanur forest disease (KFD) aka monkey diseaseGroup B togavirus (Flavivirus)Hard tick (in India);Soft tick (outside India)DengueArbovirus 4 serotypes (Den-1,2,3,4)Aedes AegyptiYellow feverFlavivirus fibricusAedes Aegypti', 'role': 'assistant'}]