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': 'Follow is the marker of HIV infection in blood - \nSelect and explain. \nA. Reverse Transcriptase, B. DNA polymerase, C. RNA polymerase, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: viral replicatin(indicate infectivity) detected by demonstration of reverse transcriptase REF:MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.578', 'role': 'assistant'}]