Name the immune protein present in the blood.

Duffy,Kidd,and Lewis are the names of . . . . . . .

$A$ person with an unknown blood group under the $ABO$ system has suffered significant blood loss in an accident and requires an immediate blood transfusion. $A$ friend,who has a valid certificate of their own blood type,offers to donate blood without delay. What would be the blood group of the donor friend?

Cyanocobalamine is essential for the formation of

What is the approximate lifespan of white blood cells (leukocytes) in humans?

Match the Column $I$ (Blood corpuscles) with Column $II$ (functions).

$i$. Neutrophils	$b$. Phagocytosis
$ii$. Basophils	$c$. Secretion of histamines
$iii$. Acidophils (Eosinophils)	$d$. Antihistaminic
$iv$. Lymphocytes	$a$. Immunity