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': 'IL-1 and TNF - α during inflammation are secreted by \nSelect and explain. \nA. Plasma cells, B. Activated macrophages, C. Lymphocytes, D. Platelet', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]