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
All except one are true regarding Barrett's esophagus- 
Select and explain. 
A. More incidence of sq. cell ca, B. Metaplasia, C. Columnar epithelium, D. Involves lower oesophagus
A: More incidence of sq. cell ca
Answer: A: More incidence of sq. cell ca 
Explanation: There is an increased incidence of adenocarcinoma in Barret's esophagus. Barrett's esophagus is a premalignant condition with an increased incidence of adenocarcinoma of esophagus. The risk of adenocarcinoma increases with increasing length of columnar-lined epithelium Also, remember Barrett's esophagus is the single most impoant risk factor for adenocarcinoma of esophagus. The adenocarcinoma develops at the squamo-columnar junction (-85%) or within 2 cm of the junction. Ref : Bailey & Love 25/e p1022