Final answer:
The normal WBC count falls between 3.5 and 11 x 10^9 cells/L and leukocytes are counted in the thousands. Option 1) 5 K/μl is within the normal range.
Step-by-step explanation:
The normal white blood cell (WBC) count varies depending on age and gender, but generally falls between 3.5 and 11 x 10⁹ cells/L. This range is considered healthy and indicates normal immune function.
In terms of measurement, leukocytes are counted in the thousands, with primate counts ranging from 4,800 to 10,800 cells per μl.
Therefore, the answer to your question would be option 1) 5 K/μl, as it falls within the normal range of WBC count in healthy individuals.