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

Correct answer: C. No antigens A and B on RBCs

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

Explanation

In ABO blood group, O refers to O blood group. It has no antigen (A and B) on RBCs.

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