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: Medicine
[{'content': 'Which of the following laboratory determinants is abnormally prolonged in ITP? \nSelect and explain. \nA. APTT, B. Prothrombin time, C. Bleeding time, D. Clotting time', 'role': 'user'}, {'content': "Answer: C \nExplanation: Immune thrombocytopenic purpura is an acquired disorder characterized by immune-mediated destruction of platelets and inhibition of release of platelets from the megakaryocyte. Since plateletsare involved bleeding time is abnormally prolonged in ITP. APTT, PT, CT are prolonged in coagulation disorders. Ref: Harrison's Principle of Internal Medicine, 18th Edition, Page 968, Chapter 115", 'role': 'assistant'}]