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': 'Reverse transcriptase sequence in HIV is best described as: \nSelect and explain. \nA. RNA - DNA - RNA, B. DNA - RNA, C. DNA - RNA - DNA, D. RNA - DNA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) RNA - DNA - RNA', 'role': 'assistant'}]