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: Pathology
[{'content': 'Examples of metaplasia are the following except? \nSelect and explain. \nA. Breast enlargement at pubey, B. Barrets esophagus, C. Myositis Ossificans, D. Respiratory tract in chronic smokers', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Breast enlargement at pubey", 'role': 'assistant'}]