Which test measures the complete blood count, including red cell indices and hemoglobin?

• A. Calcium test
• B. Cholesterol test
• C. Blood urea nitrogen (BUN)
• D. Complete blood count

Answer: (D)

A complete blood count provides a snapshot of the blood’s cellular components, including red blood cells, white blood cells, and platelets, plus detailed red cell measurements. It reports hemoglobin concentration and hematocrit, which reflect the blood’s oxygen-carrying capacity, as well as red cell indices such as mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, and red cell distribution width. These indices describe cell size and hemoglobin content per cell, which helps classify anemia and assess red cell quality. The other tests measure different aspects of health: calcium testing looks at mineral levels, a cholesterol panel assesses lipids, and blood urea nitrogen evaluates kidney function. Because the question specifically asks for a test that includes the complete blood count along with red cell indices and hemoglobin, this test best fits.