<prompt> Which of the following forms the Passavant;s ridge?PalatoglossusSalpingopharyngeusPalatopharyngeusHyoglossus  <response>: 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 passavants muscle which on contraction raises a ridge called the Passavants Ridge. REF.BDC VOL.3,FIFTH EDITION 