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': 'HIV can -a) Cross blood brain barrierb) RNA virusc) Inhibited by 0.3% H2O2 d) Thermostable \nSelect and explain. \nA. abc, B. bc, C. acd, D. bcd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]