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
[{'content': 'Maltoma is positive for- \nSelect and explain. \nA. CD 3, B. CD 10, C. CD 23, D. CD 5', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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', 'role': 'assistant'}]