This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Human Immunodeficiency Virus, Subject name: Microbiology
[{'content': 'HIV virus contains: \nSelect and explain. \nA. Single stranded DNA, B. Single stranded RNA, C. Double stranded DNA, D. Double stranded RNA', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Single stranded RNA(Ref: Ananthanarayan, 9th/e, p. 571 and 8th/e, p. 570)* The genome in HIV is diploid, composed of two identical single stranded positive sense RNA copies.", 'role': 'assistant'}]