Which are the largest corpuscles in human blood?

Where is prothrombin found and what is its function?

$A$ person with an unknown blood group ($ABO$ system) has lost a large amount of blood in an accident and needs an immediate blood transfusion. $A$ friend of the person has a valid certificate of their own blood group and is ready to donate blood without delay. What could be the blood group of the donor friend?

Which of the following has the least consistency in shape?

$Rh$ factor is named after:

The component of blood which prevents its coagulation in the blood vessels is