<prompt> All are the predisposing factors for carcinoma esophagus exceptAchalasiaTylosis palmarisZenkers diveiculumEctodermal dysplasia  <response>: Risk factors for SCC:SmokingAlcoholIngested carcinogens Chronic AchalasiaLye caustic ingestionLong-term ingestion of hot liquidsPlummer Vinson syndromeTylosis palmaris et plantarisHuman papilloma virusEsophageal diveiculaDeficiency: Vitamin A, zinc, molybdenumRef: Harrison; 19th edition 