This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Carbohydrate in ABO blood group antigens is ? \nSelect and explain. \nA. Glucose, B. Frucose, C. Inulin, D. Maltose', 'role': 'user'}, {'content': "Answer: B \nExplanation: 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 antigen'A' 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.", 'role': 'assistant'}]