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: Unknown
[{'content': 'False about Barrett’s oesophagus is: \nSelect and explain. \nA. In short – segment Barrett’s there is less than 3 cm of columnar epithelium, B. Barrett’s ulcer occurs just above the squamocolumnar junction, C. If a peptic stricture occurs in Barrett’s oesophagus it always occurs at the new squamocolumnar junction, D. It is a premalignant condition', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Barrett’s ulcer is an ulcer in the columnar lined portion of a Barrett’s oesophagus.\nThese are distinct from the more usual erosions of reflux oesophagitis that always occur at or just above the squamocolumnar junction.', 'role': 'assistant'}]