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
Metaplasia arises from reprograming of 
Select and explain. 
A. Stem cells, B. Stellate cells, C. Squamous cells, D. Columnar cells
A: Stem cells
Answer: A: Stem cells 
Explanation: 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