Which of the following is found in the highest concentration in the blood?

The $ABO$ blood grouping system is based on which of the following?

The most well-known blood grouping is the $ABO$ group,named as $ABO$ and not $ABC$,because '$O$' in it refers to having:

Which are the most active phagocytic white blood cells?

Choose the correct statements regarding human blood:
$I$. The volume of blood in an adult is $5 \; L$.
$II$. It constitutes $30-35 \; \%$ of the total extracellular fluid.
$III$. Glucose concentration in the blood is $50 \; mg / 100 \; mL$.
$IV$. Cholesterol concentration in the blood is less than $200 \; mg / 100 \; mL$.
$V$. Urea level in the blood is $10 \; mg / 100 \; mL$.
The option with correct statements is:

The nucleus of granular $WBC$ is mainly .....