The graveyard of $RBC$ is:

Which of the following white blood cells are present in the maximum number?

Which substance is secreted by eosinophils during an allergic reaction?

Clotting of blood involves

If a child has blood group $O$ and the father has blood group $B$,which of the following blood groups cannot be the mother's?

Mature erythrocytes are enucleated in the following animals $EXCEPT$:
i. Rat
ii. Monkey
iii. Llama
iv. Camel
v. Elephant
Choose the correct answer from the options given below.