This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Common carotid aery divides at the level of 
Select and explain. 
A. Hyoid bone, B. Cricoid cailage, C. Superior border of thyroid cailage, D. Inferior border of thyroid cailage
C: Superior border of thyroid cailage
Answer: C: Superior border of thyroid cailage 
Explanation: 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