Mark the odd one out.

Which of the following is an agranulocyte?

Which of the following blood clotting factors is considered non-existent or invalid?

$A -$ Fibrinogen is needed for the clotting of blood,and globulins are involved in defense mechanisms of the body.
$R -$ Factors for the coagulation of blood are present in the blood in an inactive form.

What is the fluid remaining after the process of blood coagulation called?

Select the incorrect statements with reference to $Rh$ grouping.
$A$. Erythroblastosis foetalis is a condition observed having foetus with $Rh^{+ve}$ blood and mother with $Rh^{+ve}$ blood.
$B$. $Rh$ antigen is observed on $RBCs$ in the majority of human beings.
$C$. Before blood transfusion, $Rh$ group should also be matched.
$D$. $Rh$ incompatibility is observed when a pregnant mother is $Rh^{-ve}$ and the foetus is $Rh^{+ve}$.
$E$. Erythroblastosis foetalis can be avoided by administering anti-$Rh$ antibodies to the mother immediately after the delivery of the second child.
Choose the answer from the options given below: