Passavant's ridge is formed by-: (A) Cricopharyngeus and superior constrictor, (B) Palatopharyngeus and superior constrictor, (C) Palatoglossus and superior constrictor, (D) Thyropharyngeus and superior constrictor
Answer is B. Ans. is 'b' i.e., Palatopharyngeus and superior constrictor Passavant's Ridgeo Some of the upper fibres of the palatopharyngeus pass circularly deep to the mucous membrane of the pharynx, and form a sphincter internal to the superior constrictor. These fibres constitute Passavant's muscle which on contraction raises a ridge called the Passavant's ridge on the posterior wall of the nasopharynx.