A 45-year-old premenopausal woman has microcytic anaemia (Hb 9 g/dL, low MCV, low ferritin). She reports heavy menstrual bleeding but no GI symptoms. What is the most appropriate initial management?AReassure; no treatment neededBStart oral ferrous sulphate and arrange investigation for possible causes including heavy menstrual bleeding and consider coeliac screeningCArrange urgent colonoscopy onlyDStart blood transfusion in all casesEIron injections as first-lineCheck my answer