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': 'HIV can infect all except: \nSelect and explain. \nA. Circulating dendritic cells, B. CD4 T lymphocytes, C. Macrophages, D. Cytotoxic T cells', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. d. Cytotoxic T cells', 'role': 'assistant'}]