<prompt> Xray showing air column between soft tissue mass and posterior wall of nasopharynx is suggestive of ?Ethmoidal polypAntrochoanal polypNasal myiasisNone of the above  <response>: Ans. is b i.e., Antrochoanal polyp On xray,antrochoanal polyp appears as a soft tissue density and shows a column of air between the soft tissue mass and posterior wall of nasopharynx. 