<prompt> The adenocarcinoma of esophagus-develops in ?Barrets esophagusLong standing achalasiaCorrosive strictureAlcohol abuse  <response>: Ans. is a i.e., Barretts Esophagus Adenocarcinoma of esophagus almost always arises in Barretts esophagus. Other option i.e. long standing achalasia, corrosive stricture and alcohol abuse are risk factors for squamous cell Ca of esophagus 