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': 'Which of the following cells is instrumental in transmitting human immunodeficiency virus (HIV) to CD4+ T lymphocytes? \nSelect and explain. \nA. Neutrophils, B. Dendritic cells, C. CD8+cells, D. NK cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]