Blood group $AB$ has

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

Which type of white blood cells are associated with the release of histamine and the natural anticoagulant heparin?

In a medicolegal case of accidental interchange between two babies in a hospital,the baby of blood group $A$ could not be rightly given to a couple with:

The shape of the nucleus of $WBC$ is usually

Which of the following is formed last during the process of blood coagulation?