This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Medicine
[{'content': 'A patient with steatorrhea has microcytic anemia. The urine excretion of D-Xylose after 25 gm oral D- Xylose is 2.5 gm. He Is suffering from: \nSelect and explain. \nA. Celiac sprue, B. Chronic pancreatitis, C. Tropical sprue, D. Ileal resection', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Celiac sprue* Malabsorption syndrome affecting proximal intestine will lead to iron, folic acid and calcium deficiency as these nutrients are absorbed from duodenum and jejunum.* D xylose is also absorbed from proximal mucosa hence will not be absorbed in conditions affecting proximal mucosa.* Celiac sprue predominantly affects proximal intestine. Tropical sprue mainly affects distal intestine.* Chronic pancreatitis will not affect mucosa of intestine therefore D xylose test will be normal.', 'role': 'assistant'}]