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': 'IFN - α is secreted by \nSelect and explain. \nA. Leucocytes, B. Fibroblasts, C. TH Cells, D. Tc Cells', 'role': 'user'}, {'content': 'Answer: A \nExplanation: IFN -\xa0α - Leucocytes\nIFN -\xa0β - Fibroblasts\nIFN -\xa0γ - TH & TCcells, NK Cells.', 'role': 'assistant'}]