<prompt> Which of the following is true about an antrochoanal polyp?Common in adultsCommonly SingularCommonly bilateralIs usually allergic  <response>: Ans. is b i.e., Commonly Singular Antrochoanal PoIvdEthmoidal PolypCommon in childrenCommon in adultsInfectionAllergySolitaryMultipleUnilateralBilateralMaxillary sinus near the ostiumEthmoidal sinuses, uncinate process, middle turbinate and middle meatusGrows backward to the choanaMostly grow anteriorly and may present at the naresPolypectomy; endoscopic removal orPolypectomyCaldwell-Luc operation if recurrentEndoscopic surgery or ethmoidectomy Which may be intranasal, extranasal or transantral 