Find out the wrong match.

Leucocytes are colourless due to

What is the average amount of hemoglobin present in $100 \ ml$ of blood?

Which of the following blood corpuscles secrete serotonin?
$I$. Basophils $\quad$ $II$. Eosinophils
$III$. Thrombocytes $\quad$ $IV$. Lymphocytes
$V$. Monocytes
Select the correct option from the following:

Which of the following $WBCs$ is present in the highest amount?

If glucose is to be injected into human blood,the property that must be matched with blood is