This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
True regarding barret's oesophagus is - 
Select and explain. 
A. Benign course, B. Premalignant condition, C. Sq. metaplasia of lower oesophagus, D. Medical T/t is not usefull
B: Premalignant condition
Answer: B: Premalignant condition 
Explanation: Barrett's esophagus is an Intestinal metaplasia (not squamous metaplasia) which follows the metaplasia - dysplasia - cancer course (a premalignant condition for adenocarcinoma of esophagus) Now about the medical t/t Though medical treatment does not reve back the metaplastic changes, it can be used to treat the underlying reflux disorder and prevent fuher damage. Ref : Bailey & Love 25/e p1023