Donnan effect is shown by

Match column $I$ with column $II$:

Column $I$	Column $II$
$(a)$ Eosinophils	$(i)$ Coagulation
$(b)$ $RBC$	$(ii)$ Universal Recipient
$(c)$ $AB$ Group	$(iii)$ Resist Infections
$(d)$ Platelets	$(iv)$ Contraction of Heart
$(e)$ Systole	$(v)$ Gas transport

Which of the following is correct regarding blood coagulation?
$I$. Vitamin-$K$ is necessary for the formation of prothrombin.
$II$. Conversion of fibrinogen to fibrin is done by thrombin.
$III$. Conversion of prothrombin to thrombin is done by the enzyme complex prothrombinase.
The option with the correct combination is:

Assertion $A$: In an open circulatory system,the blood volume is high,but the blood pressure is low and irregular.
Reason $R$: In a closed circulatory system,the blood volume is limited,and the blood pressure is high and regular.
Which option is correct for Assertion $A$ and Reason $R$?

Which of the following statements are wrong?
$(i)$ Leucocytes disintegrate in the spleen and liver.
$(ii)$ $RBC$,$WBC$ and blood platelets are produced by bone marrow.
$(iii)$ Neutrophils bring about destruction and detoxification of toxins of protein origin.
$(iv)$ The important function of lymphocytes is to produce antibodies.

Which of the following vertebrate organs receives only oxygenated blood?