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
False positive urinary D-xylose test is seen in: 
Select and explain. 
A. Ascites, B. Blind loop syndrome, C. Celiac disease, D. Eosinophilic gastroenteritis
A: Ascites
Answer: A: Ascites 
Explanation: An abnormal test (<4.5 g excretion) indicates the presence of duodenal/jejunal mucosal disease. Like celiac disease, crohn's disease, Eosinophilic gastroenteritis and small intestinal lymphoma. The D-xylose test can also be abnormal in blind loop syndrome. False-positive study is seen in patients with ascites and pleural effusion. Ref: Harrison, E-18, P-2467.