Which of the following is not a type of blood group or blood factor system?

Which vitamin helps in blood clotting?

Match the type of blood cells in Column $I$ with their respective structure in Column $II$ and function in Column $III$ and select the correct option given below.

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.

$Rh$ factor is named after:

If the husband is $Rh^+$ and the wife is $Rh^-$,then:

Blood groups are named because of the agglutinogens $A$ and $B$ present in: