This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Febrile response in CNS is mediated by \nSelect and explain. \nA. Bacterial toxin, B. IL1, C. IL6, D. Interferon', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ref Harrison 18/e 143p -145 Fever is produced in response to substance called pyrogens that acts by stimulating prostaglandins synthesis in vascular and periferal cells of hypothalamus.there are exogenous and endogenous pyogens', 'role': 'assistant'}]