<prompt> Choana is:anterior naresPosterior naresTonsilsLarynx  <response>: Posterior nares Nasal cavity: Nasal fossae are two irregular cavities extending from the mucocutaneous junction with the nasal vestibule in frontanterior nares to the junction with the nasopharynx behindposterior nares or choanae Ref.Dhingra 5e,p 150.6e,p 135. 