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': 'A person has history of steatorrhoea of long duration. D-xylose was ordered. 5 hour urine sample show < 4.5 g excretion after giving 25g D-xylose. What is the probable diagnosis  a) Celiac disease  b) Pancreatitis  c) Blind loop syndrome  d) Heal disease \nSelect and explain. \nA. ac, B. ab, C. ad, D. bd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]