This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology: White Blood Cells (Miscellaneous questions), Subject name: Pathology
[{'content': 'Marker for granulocytic sarcoma: \nSelect and explain. \nA. CD33, B. CD38, C. CD117, D. CD137', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Marker for granulocytic sarcoma is CD117', 'role': 'assistant'}]