Passavant's ridge is formed by-
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.
Cricopharyngeus and superior constrictor
Palatopharyngeus and superior constrictor
Palatoglossus and superior constrictor
Thyropharyngeus and superior constrictor
Anatomy and Physiology of Pharynx