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': 'Bone marrow stem cells differ from differentiated progenitor stem cells in what respect? \nSelect and explain. \nA. Provide differentiated terminal cells, B. Reconstitution of Bone marrow, C. Formation of the ovum, D. Act as a repair system for the body', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]