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': 'Which of the following is the investigation of choice for invasive amebiasis? \nSelect and explain. \nA. ELISA, B. Microscopy, C. Indirect hemagglutination, D. Counterimmunoelectrophoresis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Among the options given in the question ELISA is the investigation of choice in invasive amoebiasis. It has a sensitivity and specificity of 100 and 60%. But PCR assay for DNA in stool samples is currently most sensitive and specific method for identifying E.histolytica infection. Ref: Harrisons Internal Medicine, 18th Edition, Chapter 209 ; Current Medical Diagnosis and Treatment 2012, Chapter 35', 'role': 'assistant'}]