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': 'A patient has normal PT and platelet count with increased aPTT, factor 8 levels given as 60 iu/ml, no bleeding history. diagnosis?a) Factor IX deficiencyb) Thalassemiac) Factor VIII inhibitorsd) Lupus anticoagulant \nSelect and explain. \nA. ad, B. c, C. ac, D. ab', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]