Unknown The need for vitamin B12 and folic acid in the formation of red blood cells is related primarily of their effects on: A Synthesis and release of erythropoietin from the kidney B Absorption of iron from the gut C DNA synthesis in bone marrow D Hemoglobin formation in the red blood cell 💡 Explanation The need for vitamin B12 and folic acid in the formation of red blood cells is related primarily of their effects on: ✓ Correct Answer: C. DNA synthesis in bone marrow