For erythropoiesis to proceed normally,protein synthesis requires adequate supplies of factors,such as vitamin B₁₂,which is absorbed from the diet in the presence of which of the following?

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Intrinsic factor is required for the absorption of vitamin B₁₂ from the diet. This vitamin is essential for erythropoiesis, as it is involved in the synthesis of DNA during erythrocyte production. Thyroxine, Factor X, platelet factor, and EPO are not directly involved in the absorption or utilization of vitamin B₁₂.

For Erythropoiesis to Proceed Normally,protein Synthesis Requires Adequate Supplies of Factors,such