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: Microbiology
[{'content': 'All cause malabsorption except \nSelect and explain. \nA. Giardia lamblia, B. Mycobacterium avium-intracellulare, C. Ascariasis, D. Microsporidium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ascariasis', 'role': 'assistant'}]