This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Duodenal aspirate is used in diagnosis of \nSelect and explain. \nA. E histolytica, B. Giardia lamblia, C. Taenia solium, D. Leishmania', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Duodenal aspirate is used for G lambia, o sinesis, F heptica, and S stercoralis. ref : baveja book of microbiology .', 'role': 'assistant'}]