<prompt> Sinonasal neoplasm is commonly seen in which industry?FishingBuildingHard woodIron steel  <response>: Aetiology of malignant neoplasms Cause of sinus malignancy is largely unknown. People working in the hardwood furniture industry, nickel refining, leather work and manufacture of mustard gas have shown a higher incidence of sinonasal cancer. Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 231 