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Question: Answered & Verified by Expert
The most popularly known blood grouping is the $\mathrm{ABO}$ grouping. It is named $\mathrm{ABO}$ and not $A B C$, because ' $O$ ' in it refers to having
BiologyBody Fluids and CirculationNEETNEET 2009 (Screening)
Options:
  • A other antigens besides A and B on RBCs
  • B over dominance of this type on 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
Solution:
2784 Upvotes Verified Answer
The correct answer is: no antigens $A$ and $B$ on RBCs
Landsteiner divided human population into four groups based on the presence of antigens found in their RBCs. Each group represented a blood group. Thus, there are four types of blood groups A, B, AB and O. Blood group ' $O$ ' does not contain any antigen on RBCs, hence can be given to any person, that's why this blood group is called universal donor.

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