Oxidation of glucose under mild conditions is used as a clinical test for diabetes mellitus. Which of the following sugars can be oxidized? In other words, which are reducing sugars? H c-o H-C-OH 1. H CH 2. H-C-OH HO H-C- OH HC-OH H OH H H-OH OH H OH H OH OH OH 3. HO. H HO OH H H OH OH OH H OH