Arrange the following steps of dietary non-heme iron absorption, transport, and storage in the human body in the correct physiological sequence: 1. Oxidation of ferrous iron (Fe2+) to ferric iron (Fe3+) by hephaestin. 2. Transport of ferrous iron (Fe2+) across the apical membrane of the enterocyte via Divalent Metal Transporter 1 (DMT1). 3. Binding of ferric iron (Fe3+) to apotransferrin in the blood to form transferrin for systemic transport. 4. Reduction of dietary ferric iron (Fe3+) to ferrous iron (Fe2+) by duodenal cytochrome B (DCYTB) at the brush border. 5. Export of ferrous iron (Fe2+) across the basolateral membrane into the interstitial fluid via ferroportin. Select the correct answer using the code given below:

Options:

• A: 2-4-1-5-3
• B: 2-4-5-3-1
• C: 4-2-5-1-3
• D: 4-5-2-1-3

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