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': 'A young patient is hospitalized with petechiae of oral mucous membrane, marginal gingival hemorrhage and with a platelet count of 45,000/ cc. The BT and Clot Retraction time are increased, RBC and TLC are normal. He is suffering from: \nSelect and explain. \nA. Infectious mononucleosis, B. Thrombocytopenic purpura, C. Leukemia, D. Hemophilia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]