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Q.
Which blood group is a universal recipient?
AMUAMU 2001
Solution:
On the basis of presence or absence of certain antigen, $ABO$ blood group has been established in man by $K$ Landsteiner. It was found that there can be two antigens $A$ or $B$ and as a result four blood groups. These blood groups are called $ABO$ blood group or Landsteiner blood group.
