This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': '60 yr old male presented with dysphagia. Mucosal biopsy is provided here which show? \nSelect and explain. \nA. Squamous metaplasia, B. Columnar metaplasia, C. Anaplasia, D. Connective tissue metaplasia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]