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: Medicine
[{'content': 'Human stem cells express: \nSelect and explain. \nA. CD14, B. CD8, C. CD34, D. CD10', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Human stem cells express C-kit, C-mpl and usually cluster of differentiation determinant — 34 (CD34).', 'role': 'assistant'}]