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