<prompt> Gastrectomy produces deficiency of which vitamin -VitaminB6Vitamin B12Vitamin B2Vitamin B1  <response>: Ans. is b i.e.. Vitamin B12 o The intestinal absorption of vitamin Bu requires intrinsic factor IF, secreted by parietal cells of the stomach.o In stomach vitamin Bt2 binds to IF to form vitamin Bn-IF complex which intum is absorbed by sepecific receptors on mucosal cells of the ileum.o Vitamin Buis also called as extrinsic factor of castle. 