This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology, Subject name: Microbiology
[{'content': 'Investigation of choice for amoebiasis is? \nSelect and explain. \nA. ELISA, B. Colonoscopy, C. Microscopy, D. Microscopy + ELISA', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. (d) Microscopy + ELISARef: Harrison's 18thed ch-109", 'role': 'assistant'}]