Prothrombin,which helps in the clotting of blood,is present in:

$A$ doctor suggested a couple not to have more than one child because:

Identify the blood cells shown below.

Which antisera is used to detect the $Rh$ blood group?

$A$: Blood group phenotype is controlled by the presence or absence of antigens present on the surface coating of $RBC$.
$R$: These antigens are of three types and are found in the oligosaccharide-rich head regions of a glycophorin.

Serum is: