Ans. is 'b' i.e., In patients with pernicious anemia, the results of the schilling test normalize after oral administration of intrinsic factor An abnormal Schilling Is test that corrects or normalizes after administration of intrinsicfactor suggests a diagnosis of Pernicious Anemia (Intrinsic Factor Deficiency).Shilling '.s' test corrects after the administration ofo Intrinsic factor-Pernicious anemiao Pancreatic enzyme-Exocrine pancreatic deficiencyo Five day antibiotic-Bacterial overgrowth syndromeso Does not correct after administration of any of the above-Ileal dysfunction