Clotting of blood involves

$A$ person with $AB$ blood group is called a universal recipient because .....

$A$ woman of blood group $O$ presented a baby of blood group $O$ which she claimed as her child. She brought a suit against a man of $AB$ blood group as the father of the child. Which statement is correct as per your judgement?

If red blood cells are placed in distilled water,they will

Match the following columns and select the correct option.

Column-$I$	Column-$II$
$(a)$ Eosinophils	$(i)$ Immune response
$(b)$ Basophils	$(ii)$ Phagocytosis
$(c)$ Neutrophils	$(iii)$ Release histaminase,destructive enzymes
$(d)$ Lymphocytes	$(iv)$ Release granules containing histamine

Granulocytes and agranulocytes are the two main categories of