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
HIV can -a) Cross blood brain barrierb) RNA virusc) Inhibited by 0.3% H2O2 d) Thermostable 
Select and explain. 
A. abc, B. bc, C. acd, D. bcd
A: abc
Answer: A: abc 
Explanation: None