State the following statement True or False:
White blood cells are also called leukocytes.
A. True
B. False

Hint: White blood cells (WBCs) are the components of blood and are important players in imparting cellular defense against pathogenic substances like viruses, bacteria, protozoa, allergens etc. They are produced from the hematopoietic stem cells of the red bone marrow via the myeloid lineage. WBCs are of many types that serve different functions.

Complete answer:
Option A: True
Now, this is a correct statement that White blood cells are also known as leukocytes.
To answer this we need to plot the relation between the white colors of the WBCs, including the literal meaning of the term leukocytes and at last we will try to define the synonymous terms of leukocytes with White blood cells.
Let’s first begin with the color of white blood cells.
Usually the white blood cells are colorless but they can still be viewed under the microscope as colored cells using special stains like eosin. So, they are called white because they naturally do not have any particular color as compared to red blood cells which are red in color.
Now, what does leukocytes actually mean –
If we go deep into the etymology and origin of the word leukocyte, it is composed of two Greek words “leukos” which means white and “cytos” which means cells. Thus leukocytes mean white cells of the blood.
Thus, leukocyte and white blood cell are synonymous terms.
Option B: False
This statement cannot be false because the term leukocyte actually means white cells which is synonymous to WBCs.

Therefore, Option A. True is the correct answer.

Note:
All white blood cells have nuclei, which can distinguish them from other blood cells. The different types of white blood cells are categorized uniformly; they classify two pairs of broader categories according to structure (granulocytes or agranulocytes) or according to cell origin (marrow cells or lymphocytes). These broader categories can be divided into five main types: neutrophils, eosinophils (eosinophils), basophils, and lymphocytes and monocytes.