This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cellular Pathology, Subject name: Pathology
[{'content': 'Metaplasia arises from reprograming of \nSelect and explain. \nA. Stem cells, B. Stellate cells, C. Squamous cells, D. Columnar cells', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Stem cells(Ref: 9th/pg 36; 8th/pg 8)Mechanism of metaplasia: Reprogramming of stem cellsQ in normal tissues or of undifferentiated mesenchymal cells present in connective tissue.Q', 'role': 'assistant'}]