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: Physiology
[{'content': 'Fever is due to: \nSelect and explain. \nA. Interleukin-1, B. Interleukin-2, C. Interleukin-3, D. Interleukin-4', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Interleukin-1', 'role': 'assistant'}]