<prompt> Adenocarcinoma of ethmoid sinus associated withWoodworkersNickel workersCoal workersChimney workers  <response>: Ans. is a i.e Woodworkers Workers of wood industry develop - Adenocarcinomas of ethmoid other nasal sinusesWorkers of Nickle refining industry - Sq. cell Ca anaplastic Ca of nasal sinuses. 