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 9 year old boy with elevated both PT and APTT. What is the diagnosis? \nSelect and explain. \nA. Defect in extrinsic pathway, B. Defect in Intrinsic pathway, C. Platelet function defect, D. Defect in common pathway', 'role': 'user'}, {'content': 'Answer: D \nExplanation: . Defect in common pathway', 'role': 'assistant'}]