<prompt> In Barrett;s oesophagus, lining isSquamous cell epitheliumTransitional cell epitheliumSecreting columnar cell epitheliumNone of the above  <response>: .BARRETT;S OESOPHAGUS is the metaplastic changes in the mucosa of the oesophagus as the result of GORD. Squamous epithelium of lower end of the oesophagus is replaced by diseased columnar epithelium columnar metaplasia. There is a macroscopical visible length of columnar mucosa with microscopic features of intestinal metaplasia. It affects lower oesophagus commonly often middle oesophagus also. Ref: SRB;s manual of surgery,3 rd ed, pg no 744 