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: Medicine
[{'content': 'Best Test for intestinal malabsorption \nSelect and explain. \nA. D-xylose test, B. NBT-PABA TEST, C. Fecal fatestimation, D. Schilling test', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]