This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'Chemokine co-receptor for HIV found on macrophage is - \nSelect and explain. \nA. CD4, B. CD8, C. CCR5, D. CXCR4', 'role': 'user'}, {'content': 'Answer: C \nExplanation: CXCR4 for T cell tropic HIV strain&CCR5 for macrophage tropic strain REF:MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.574', 'role': 'assistant'}]