Multiple choice The normal range of haemoglobin in the blood of a healthy adult person is _________. 10 to 16 grams per decilitre 12 to 18 grams per decilitre 14 to 20 grams per decilitre 8 to 13 grams per decilitre Reveal answer Fill a bubble to check yourself B Correct answer Explanation The standard medical reference range for hemoglobin in healthy adult males is typically 13.5 to 17.5 g/dL and for females 12.0 to 15.5 g/dL, making 12 to 18 g/dL the most accurate range provided.