This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Maltoma is positive for- 
Select and explain. 
A. CD 3, B. CD 10, C. CD 23, D. CD 5
C: CD 23
Answer: C: CD 23 
Explanation: Its an extra nodal marginal zone B cell lymphoma of MALT type.It is characterised by diffuse infilteration by monoclonal small B lymphocytes. CD 23 is a B cell marker.But its negetive for CD5. Reference : Harsh Mohan textbook of pathology, 7th edition.Pg no.356,357