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
Highly specific test for HIV antibodies is: 
Select and explain. 
A. ELISA, B. Southern blot, C. Nohern blot, D. Western blot
D: Western blot
Answer: D: Western blot 
Explanation: Western blot