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
Burkitt's lymphoma is positive for ? 
Select and explain. 
A. CD5, B. CD 15, C. CD 20, D. CD 25
C: CD 20
Answer: C: CD 20 
Explanation: Ans. is `c' i.e., CD 20 Burkitt's lymphoma is a tumor of mature B cells that express surface IgM, CD19, CD20, CD10, and BCL6, a phenotype consistent with a germinal center B-cell origin.