MCQ
Universal donor is
  • A
    $O R h^{+i i}$
  • $O R h^{-i i}$
  • C
    $A B R h^{+i i}$
  • D
    $A B R h^{-i i}$

Answer

Correct option: B.
$O R h^{-i i}$
b
With regard to transfusions of whole blood or packed red blood cells, individuals with $O$ type negative blood are often called universal donors, and those with type $AB$ positive blood are universal recipients, however, these terms are only generally true with respect to possible reactions of the recipients anti-$A$ and anti-$B$ antibodies to transferred red blood cells.

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