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

Answer 1

The correct option is D

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.

So, the correct answer is - no antigens A and B on RBCs.