This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
At which level does the Common Carotid Aery end? 
Select and explain. 
A. Level of Hyoid bone, B. Upper border of cricothyroid membrane, C. Upper border of cricoid cailage, D. Upper border of thyroid cailage
D: Upper border of thyroid cailage
Answer: D: Upper border of thyroid cailage 
Explanation: At the level of the upper border of the thyroid cailage, in the carotid triangle, the common carotid aery ends by dividing into the external and internal carotid aeries on the right and left sides.