Common carotid bifurcates at which border of thyroid cailage?
Superior
Inferior
Lateral
Medial
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.
Pharynx, larynx and trachea and cranial nerves 3,4,6