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 granulocytic sarcoma is: \nSelect and explain. \nA. CD33, B. CD38, C. CDI17, D. CDI37', 'role': 'user'}, {'content': 'Answer: C \nExplanation: . CDI17', 'role': 'assistant'}]