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': 'Atypical lymphoid cells in infectious moninucleosis - \nSelect and explain. \nA. Monocytes, B. CD lymphocytes, C. Killer T cells, D. Lymphoblasts', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cd8 + t cells bring about killing of B cells and are pathognomonic atypical lymphocytes seen in blood in infectious mononucleosis. Reference textbook of Pathology 7th edition author Harsha Mohan page number 330.', 'role': 'assistant'}]