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': 'Malabsorption is caused by all except: \nSelect and explain. \nA. Ascaris lumbricoides, B. Stronglyoides, C. Capillaria philiphinesis, D. Giardia lamblia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ascaris lumbricoides', 'role': 'assistant'}]