A person with an unknown blood group under th | vedclass

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(B) The blood type $O$ does not possess any antigens ($A$ or $B$) on the surface of its red blood cells,but it contains both anti-$A$ and anti-$B$ ant

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Type $O$

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(B) The blood type $O$ does not possess any antigens ($A$ or $B$) on the surface of its red blood cells,but it contains both anti-$A$ and anti-$B$ antibodies in the plasma.Because individuals with blood type $O$ lack both $A$ and $B$ antigens,their blood will not trigger an immune reaction (agglutination) when transfused into a recipient of any blood group.Therefore,a person with blood type $O$ is considered a universal donor,making it the safest choice for an emergency transfusion when the recipient's blood type is unknown.

Column-$I$	Column-$II$
$P$. Fibrinogen	$I$. Needed for blood clotting
$Q$. Globulins	$II$. Useful in osmotic balance
$R$. Albumins	$III$. Involved in defense mechanisms

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Match the following columns:
Column-$I$ Column-$II$
$P$. Fibrinogen $I$. Needed for blood clotting
$Q$. Globulins $II$. Useful in osmotic balance
$R$. Albumins $III$. Involved in defense mechanisms

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