This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
Bioterrorism group A organisms are all except 
Select and explain. 
A. Ebola, B. Botulism, C. Rickettsia, D. Yersinia
C: Rickettsia
Answer: C: Rickettsia 
Explanation: Ans : c) Rickettsia Rickettsia is a category B diseaseCPC ClassificationCategory A: Higher priorityAnthraxBotulismPlagueSmall poxTularemiaViral hemorrhagic feverArena/ Bunya and Filo (Ebola Marburg)Category B:BrucellosisEpsilon toxin of Clostridium perfringensFood safety threats (Salmonella/shigella/Ecoli 57/47)Water safety threats ( Vibrio cholera)Glanders and melioidosisPsittacosis/ Q feverRicin toxinStaph enterotoxinTyphus feverViral encephalitisCategory C:Emerging infectious threatsNIPAH, HANTA, SARS, Influenza pandemic