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': 'All cause malabsorption except - \nSelect and explain. \nA. Giardiasis, B. Ascaris lumbricoides, C. Strongyloides, D. Capillaria phillipinesis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: largest intestinal nematode Heavy infection-intestinal obstruction Colicky cramps and loss of appetite (refer pgno:139 baveja 3 rd edition)', 'role': 'assistant'}]