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: Surgery
[{'content': 'Resection of 90% of the ileum and jejunum causes all the following except - \nSelect and explain. \nA. Hypogastrinemia, B. Steatorrhea, C. Anemia, D. Extracellular volume depletion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Harrison says “Gastric hypersecretion of acid occurs in many patients following large resection of the small intestine. The etiology is unclear but may be related to reduced hormonal inhibition of acid secretion or increased gastrin levels due to reduced small intestinal catabolism of circulating gastrin".', 'role': 'assistant'}]