A 19-year-old woman presents with fatigue and heavy menstrual bleeding. Hb is 88 g/L, MCV 70 fL, serum ferritin 6 µg/L and transferrin saturation is low. What is the most appropriate initial management of her anaemia?AOral ferrous sulfate at an elemental iron dose of 100-200 mg per dayBParenteral iron infusion immediatelyCRed blood cell transfusionDNo iron replacement; observe and repeat Hb in 3 monthsEOnly treat with oral vitamin B12 and folateCheck my answer