<prompt> Antrochoanal polyp arise from?Ethmoid sinusMaxillary sinusFrontal sinusSphenoid sinus  <response>: ANSWER: B Maxillary sinusREF: Dhingras ENT 5th ed p-188, 4th edition page 164See table of DIFFERENCES BETWEEN ANTROCHOANAL AND ETHMOIDAL POLYP in ENT December 2009 