A 45-year-old premenopausal woman presents with fatigue and pica. Her haemoglobin is 92 g/L, MCV 70 fL and ferritin 5 µg/L. She has no red-flag symptoms. What is the most appropriate initial management?AArrange intravenous iron infusion immediatelyBStart oral ferrous sulfate providing 100-200 mg elemental iron daily and investigate causesCStart vitamin B12 injectionsDReassure; no treatment is requiredEStart long-term blood transfusionsCheck my answer