<prompt> Chelating agent used in chronic thalassemia major for iron overloadOral desferroxamineEDTADeferiproneIV Deferoxamine  <response>: Defepreninone is oral chelating agent used for chronic use. Whereas desferioxamine is an iron chelator given IV .EDTA is a chelating agent used in blood banks. Ref: KDT 6e p868 