.............. blood group individuals are ca | vedclass

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(C) Individuals with blood group $O$ lack both $A$ and $B$ antigens on the surface of their red blood cells,which prevents an immune reaction when don

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$O, AB$

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(C) Individuals with blood group $O$ lack both $A$ and $B$ antigens on the surface of their red blood cells,which prevents an immune reaction when donated to individuals of other blood groups. Therefore,they are called 'universal donors'.Individuals with blood group $AB$ possess both $A$ and $B$ antigens on their red blood cells and lack both anti-$A$ and anti-$B$ antibodies in their plasma. This allows them to receive blood from any other blood group without an immune reaction. Therefore,they are called 'universal acceptors'.

Column $I$	Column $II$ $\&$ $III$
$I$. Erythrocytes	$D$. Enucleated,biconcave circular in shape; $N$. Transport of gases $O_2$ and $CO_2$.
$II$. Neutrophils	$A$. Spherical large cells,nucleus with many lobes; $O$. Phagocytic in function.
$III$. Lymphocytes	$C$. Spherical nucleus,agranular cytoplasm; $M$. Humoral and cell-mediated immunity.
$IV$. Thrombocytes	$B$. Cellular fragments small,oval shaped; $L$. Clotting of blood.

.............. blood group individuals are called 'universal donors' and .......... blood group individuals are called 'universal acceptors'.

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