Common carotid aery divides at the level of: (A) Hyoid bone, (B) Cricoid cailage, (C) Superior border of thyroid cailage, (D) Inferior border of thyroid cailage
Answer is C. At the level of the upper border of the thyroid cailage, the aery ends by dividing into the external and internal carotid aeries. The right common carotid aery is a branch of the brachiocephalic aery. the left common carotid aery is branch of the arch of the aoa. Ref.BDC volume 3 sixth edition pg no: 99