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': 'In HIV, which cells are affected \nSelect and explain. \nA. CD4, B. CD8, C. Monocytes, D. Lymphocytes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]