This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharynx, larynx and trachea and cranial nerves 3,4,6, Subject name: Anatomy
Common carotid bifurcates at which border of thyroid cailage? 
Select and explain. 
A. Superior, B. Inferior, C. Lateral, D. Medial
A: Superior
Answer: A: Superior 
Explanation: Common carotid aery bifurcates at superior border of lamina of thyroid cailage of larynx at C3 veebral level. At lower border of C6 , ending of larynx and pharynx and beginning of trachea and oesophagus.