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Persons with which blood group are called universal donors?

  • A.Ab
  • B.A
  • C.O
  • D.B

Answer: C

People with blood group O negative are called universal donors.

Their red cells carry neither A nor B antigen, so they provoke no reaction in a recipient of any group. Group AB is the universal recipient for the opposite reason: it has no anti-A or anti-B antibodies in the plasma.

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