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
Stem cells are - 
Select and explain. 
A. Labile, B. Stable, C. Permanent, D. None
A: Labile
Answer: A: Labile 
Explanation: Ans. is 'a' i.e., Laible Bone marrow stem cells are labile cells, i.e. Continuous dividing cells.Under appropriate conditions, tissues composed of labile cells regenerate after injury, provided that enough stem cells remain.