<prompt> Which of the following best differentiates antrochoanal polyp from ethmoidal polyp?They are multipleBest seen on posterior rhinoscopyRecurrence on polypectomyThey are bilateral  <response>: b Best seen on posterior rhinoscopyRef. Scott Brown, 6th ed., 41014EthmoidalAntrochoanalMainly allergic etiologyInfectiveCommonUncommonMiddle ageYoungMultipleSingleBilateralUnilateralSeen on anterior rhinoscopyPosterior rhinoscopySteroids and antihistaminics are used in ttNo roleHighly recurrentRecurrence is uncommon 