Absorptive function of the mucosa of intestine can be best assessed by -: (A) d-Xylose test, (B) NET- PABA test, (C) Stool fat estimation, (D) Urobilin levels
Answer is A. D-xylose absorption test is a medical test performed to diagnose conditions that present with malabsorption of the proximal small intestine due to defects in the integrity of the gastrointestinal mucosa. D-xylose is a monosaccharide, or simple sugar, that does not require enzymes for digestion prior to absorption Ref Davidson edition23rd pg809