The clinging of $RBCs$ together in the blood and forming a pile of coin-like structure is known as

In a normal healthy woman,the number of $RBC$ per $mm^3$ of blood is.........

During the process of blood coagulation,vitamin-$K$ helps in the

$A$ child's blood group is '$O$'. The parents' blood groups cannot be

Which of the following are required for blood clotting in mammals?

$A$: 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.