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': 'Marker for Hairy cell Leukemia is: \nSelect and explain. \nA. CD 30, B. CD 103, C. CD1, D. CD4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CD 103', 'role': 'assistant'}]