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
[{'content': 'Waterhouse-Friderichsen syndrome is seen in: \nSelect and explain. \nA. Pneumococci, B. N.meningitidis, C. Pseudomonas, D. Yersinia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fulminant meningococcemia (purpura fulminans or Waterhouse – Friderichsen syndrome)\xa0is the most\xa0rapidly lethal form of septic shock experienced by humans.\xa0\nIt diﬀers from most other form of septic\xa0shock by the prominence of hemorrhagic skin lesions (petechiae, purpura) and the consistent\xa0development of DIC.', 'role': 'assistant'}]