Question

ABO blood group antigens in humans are differentiated from each other on the basis of
(A) sialic acid (B) lipids (C) spectrin (D) glycoproteins

Answer 1

(B) is the correct answer

Answer 2

ABO blood group antigens in humans are differentiated from each other on the basis of (D) glycoproteins

Here is some more info on glycoprotein :

A glycoprotein is a type of protein molecule that has a carbohydrate attached to it. The process either occurs during protein translation or as a post translational modification in a process called glycosylation. Glycoproteins function in the structure, reproduction, immune system, hormones, and protection of cells and organisms. Blood clotting also depends on the glycoproteins prothrombin, thrombin, and fibrinogen.