Which is considered an approximate normal hematocrit value?

A. Three times the hemoglobin value: This is a standard clinical "rule of thumb." For example, if a patient's hemoglobin is 15 g/dL, their hematocrit is typically around 45%. B. Four times lower than the red blood cell count: Hematocrit is a percentage of volume, whereas RBC count is a numerical value (millions); they do not share this mathematical ratio. C. Same as the red blood cell count: These are measured in entirely different units and represent different data points. D. The same as the hemoglobin value: Hemoglobin measures the protein weight (g/dL), while hematocrit measures the percentage of volume (%) occupied by RBCs.