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': "Coagulation time is prolonged in all except - \nSelect and explain. \nA. Hemophilia, B. Von Willebrand's disease, C. Christmas disease, D. ITP", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]