The correct option is D Parietal cells
The process of red blood cell formation is called as “erythropoiesis'. Vitamin B12 helps the body make healthy red blood cells and helps keep nerve cells healthy.
Vitamin B12 (Cobalamin) is a water-soluble vitamin that is derived from animal products such as red meat, dairy, and eggs. Intrinsic factor is a glycoprotein that is produced by parietal cells in the stomach and necessary for the absorption of B12 in the terminal ileum.