Which one of the following in blood absorbs oxygen?

Identify the most abundant phagocytic cells found in the blood.

The most well-known blood grouping is the $ABO$ blood group. It is named $ABO$ instead of $ABC$ because what does the '$O$' represent?

$A$: 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.

When whole blood is stored with an anticoagulant at $4^{\circ}C$,the $K^+$ ions move out from the $RBC$ into the plasma. The most likely reason for this is that

Example of $Rh$ incompatibility is