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 elevation in both PT and A PTT. 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: Ans. is 'd' i.e., Defect in common pathway Defective coagulation pathway PT AM Extrinsic Increased Normal Intrinsic Normal Increased Common Increased Increased", 'role': 'assistant'}]