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
[{'content': "Maximum magnitude of lymphocytosis is seen with- \nSelect and explain. \nA. Pulmonary Koch's, B. Typhoid, C. Bacterial pneumonia, D. Infectious mononucleosis", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]