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': 'Investigation of choice for invasive amebiasis is: \nSelect and explain. \nA. Indirect heamagglutination, B. ELISA, C. Counter immune electrophoresis, D. Microscopy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (ELISA) In Extra-intestinal amebiasis, antibody detection by ELISA is the most sensitive test - Ghai 5th/221. ELISA : This test is positive in more than 90% of patients and it usually reves to normal with in 6-12 months. IHA : May also be done in invasive Amoebiasis or liver abscess. The interpretation of the IHA is however more difficult because titres may remain positive for as long as 10 years.', 'role': 'assistant'}]