Passavant ridge is seen in?: (A) Oropharynx, (B) Nasopharynx, (C) Laryngopharynx, (D) Lateral nasal wall
Answer is B. Nasopharyngeal Isthmus: Fibres of palatopharyngeus muscle (arising from palatine aponeurosis) +upper fibres of superior constrictor muscle form incomplete raised ring at posterior & lateral pharyngeal wall known as = Passavant ridge.