Anatomy Anterior two third of the tongue is demarcated from the posterior one third by: plexus, 2-long thoracic plexus, 2-long thoracic A Passavant's ridge B Sulcus terminalis C Circurnvallatepapillae D Filifonn papilla 💡 Explanation Anterior two third of the tongue is demarcated from the posterior one third by: plexus, 2-long thoracic plexus, 2-long thoracic ✓ Correct Answer: B. Sulcus terminalis