This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': "True about Barrett's oesophagus - \nSelect and explain. \nA. Sequence of prolonged G.E.R., B. It is premalignant, C. Lower oesophageal mucosa is replaced by intestinal type of epithelium, D. All", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'a' i.e. Sequence of prolonged GE reflux; 'b' i.e. It is premalignant; 'c' i.e. Lower esophageal mucosa is replaced by intestinal type", 'role': 'assistant'}]