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
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 
Select and explain. 
A. ac, B. ab, C. ad, D. bd
A: ac
Answer: A: ac 
Explanation: None