<prompt> Carbohydrate in ABO blood group antigens is ?GlucoseFrucoseInulinMaltose  <response>: Ans. is b i.e., FrucoseABO antigens are glycoproteins, i.e. saccharides carbohydrates linked with polypeptides.There are four main groups :i Blood group A : Containing A antigenii Blood group B : Containing B antigeniii Blood group AB : Containing both A and EV antigeniv Blood group 0 : No ABO antigenA and EV antigens are derived from H-antigen. H-antigen is formed by adding fucose to terminal galactose of backbone strucuture. The addition of N-acetyl-D-galactosamine or D-galactose to the galactose residue of H-antigen confers A or B antigen, respectively. 