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': 'RNA oncogenic virus amongst the following is? \nSelect and explain. \nA. HIV, B. HTLV, C. HBV, D. Cytomegalovirus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Oncogenic RNA Virus is Retrovirus. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO-566", 'role': 'assistant'}]