Option B is correct. Leucocytes is the normal number of WBCs in the blood is 4,500 to 11,000 WBCs per microliter (4.5 to 11.0 × 109/L). Normal value ranges may vary slightly among different labs.
Leukocyte esterase is a screening test used to detect a substance that suggests there are white blood cells in the urine. This may mean you have a urinary tract infection. If this test is positive, the urine should be examined under a microscope for white blood cells and other signs that point to an infection.
Not always. A high white blood cell count could signal certain types of cancer, such as leukemia or lymphoma, but it more often is a sign of inflammation or infection.
Learn more about leucocytes here:
