Question

The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because 'O' in it refers to having

• A. One antibody only, either anti- A or anti- B on the RBCs.
• B. No antigens A and B on RBCs.
• C. Other antigens besides A and B on RBCs.
• D. Over-dominance of this type on the genes for A and B types.

Answer 1

The correct option is B No antigens A and B on RBCs.

It is named 'ABO', because O refers here no antigens on RBCs. A blood group has A antigens, B blood group has B antigens, while AB blood group have A and B antigens on RBCs. Hence, option A is correct.