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: Medicine
[{'content': 'False positive ELISA for HIV - \nSelect and explain. \nA. Multiple mycloma, B. Lepromatous leprosy, C. SLE, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: False positive ELISA is seen in -\n\nAntibodies to class II antigens\xa0- Recent influenza vaccination\nAuto antibo dies\xa0\xa0- Acute viral infections\nHepatic disease\xa0\xa0- Connective tissue diseases e.g. SLE.\nELISA is the standard screening test for HIV infection\nIt has a sensitivity of > 99.5%, while it is highly sensitive, it is not optimal in regard to specificity.\nMost commonly used confirmatory test for the diagnosis of HIV infection - a Western Blot test', 'role': 'assistant'}]