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': 'Highly specific test for HIV antibodies is: \nSelect and explain. \nA. ELISA, B. Southern blot, C. Nohern blot, D. Western blot', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Western blot', 'role': 'assistant'}]