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': "Features of Barrett's esophagus are :a) Metaplasiab) Always gastric type of epitheliumc) Adenocarcinoma more commond) Present as patchy or ring involvement \nSelect and explain. \nA. abc, B. acd, C. bc, D. bde", 'role': 'user'}, {'content': "Answer: B \nExplanation: In barrett's esophagus red, velvety metaplastic mucosa is seen between the smooth pale pink esophageal squamous mucosa and the lusher lightbrown gastric mucosa. It may present as patches or as a broad irregular circumferential band.", 'role': 'assistant'}]