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: Pathology
[{'content': 'Which of the interleukins is responsible for endogenous pyrexia in a young lady admitted on the medical ward? \nSelect and explain. \nA. IL1, B. IL6, C. INF gamma, D. IFN alpha', 'role': 'user'}, {'content': 'Answer: A \nExplanation: IL1 also konwn as endogenous pyrogen causes fever by inducing the production of prostaglandin E2 which acts on the hypothalamus and induce a fever like reaction. IL 1 is produced by macrophages.', 'role': 'assistant'}]