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
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: 
Select and explain. 
A. Infectious mononucleosis, B. Thrombocytopenic purpura, C. Leukemia, D. Hemophilia
B: Thrombocytopenic purpura
Answer: B: Thrombocytopenic purpura 
Explanation: None