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: Biochemistry
[{'content': 'Which of the following is suitable test performed for diagnosis of intestinal malabsorption? \nSelect and explain. \nA. BT-PABA test, B. Hydrogen breath test, C. D-xylose test, D. Stool fat estimation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Intestinal malabsorption is tested by stool fat estimation. Fat digestion and absorption being more complex is often first to be affected compared to carbohydrate and protein metabolism.', 'role': 'assistant'}]