<prompt> The adenocarcinoma of esophagus-develops in -Barrets esophagusLong standing achalasiaCorrosive strictureAlcohol abuse  <response>: 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 