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
Marker for granulocytic sarcoma is: 
Select and explain. 
A. CD33, B. CD38, C. CDI17, D. CDI37
C: CDI17
Answer: C: CDI17 
Explanation: . CDI17