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': 'Interleukin secreted by macrophages, stimulating lymphocytes is: \nSelect and explain. \nA. IL-1, B. INF alpha, C. TNF alpha, D. IL-6', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Macrophages release IL-1 which stimulates the T-helper cells.\nThe T-cells in response proliferate and release IL-2 which in turn stimulates still further T-cell proliferation and B\xa0cell proliferation and differentiation into plasma cells.\n\nThus\n\nMacrophages release→IL-1*\nT-helper cells release→ IL-2*', 'role': 'assistant'}]