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': 'Which of the following is a lenti virus \nSelect and explain. \nA. HIV, B. HBV, C. HCV, D. Rabies virus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The best known lentivirus is the Human Immunodeficiency Virus (HIV), which causes AIDS. ... Lentiviruses can integrate a significant amount of viral cDNA into the DNA of the host cell and can efficiently infect nondividing cells, so they are one of the most efficient methods of gene delivery. Ref ananthnarayana and panikers microbiology textbook 8/e', 'role': 'assistant'}]