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: Pathology
[{'content': "True about Barrett's esophagus is? \nSelect and explain. \nA. Squamous metaplasia, B. Columnar metaplasia, C. irreversible, D. Cancerous", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Barrett Esophagus Barrett esophagus is a complication of chronic GERD that is characterized by intestinal metaplasia within the esophageal squamous mucosa. TEXT BOOK OF ROBBINS BASIC PATHOLOGY NINTH EDITION PAGE.561 IMAGE REF:', 'role': 'assistant'}]