<prompt> Barretts esophagus is -Lower esophagus lined by columnar epitheliumUpper esophagus lined by columnar epitheliumLower esophagus lined by ciliated epitheliumLower esophagus lined by pseudostratified epithelium  <response>: Barretts esophagusIs the metaplastic change, of gastroesophageal mucosa from normal squamous epithelium to columnar epithelium, in response to chronic gastroesophageal reflux.The function between squamous esophageal mucosa and gastric mucosa moves proximallyThree types of columnar epithelium have been described in Barretts esophagus :1. Intestinal type - the most common type2. The junctional type and3. The gastric Jaundice typeBarretts esophagus is a premalignant condition for adenocarcinoma esophagusThe hallmark of intestinal metaplasia is the presence of intestinal goblet cells. 