An abnormal rise in the number of $R.B.C.$ is called:

Universal donors have no antigens on $RBC$s and have both $a$ and $b$ antibodies. They belong to blood group:

Select the correct statement/s regarding blood groups in human.
$i$. Some genetically determined blood group systems are $ABO$, $Rh$, $Duffy$, $Lewis$, $Bombay$ blood group etc.
$ii$. Three types of agglutinogens are present on surface of human $RBCs$ such as $A$, $B$ and $D$.
$iii$. Individuals with blood group "$AB$ $Rh$ $+ve$" have $A$, $B$ and $D$ antigens on the surface of their $RBCs$ and both antibodies 'a' and 'b' in their plasma.
$iv$. Haemolytic disease of Newborn occurs when mother with $Rh$ $-ve$ blood group conceives $Rh$ $-ve$ foetus.
$v$. Individuals with '$AB$' blood group are called universal donors while those with '$O$' blood group are called universal acceptors, with reference to blood transfusion.

Match the following columns:

Column-$I$ (Cells)	Column-$II$ (Average number per $mm^3$)
$P$. Erythrocytes	$I$. $1.5$ to $3.5$ Lakhs
$Q$. Leukocytes	$II$. $6,000$ to $8,000$
$R$. Thrombocytes	$III$. $5$ to $5.5$ Million

What will happen if the spleen is removed from a human?

If a man $Rh^+$ marries a lady $Rh^-$,then