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': 'The immunoassay performed in HIV to detect the presence of antibodies to individual viral proteins is \nSelect and explain. \nA. NASBA, B. ELISA, C. Western Blot, D. PCR', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]