This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Medicine
[{'content': 'All the following are true about Haemophilia A except \nSelect and explain. \nA. PT increased, B. PTT increased, C. Serum levels of factor VIII are decreased, D. Clotting time is increased', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In Haemophilia A, bleeding time, prothrombin time and platelet counts are normal. aPTT is typically prolonged. Factor 8 is decreased. Clotting time is increased. Reference : Medicine, Prep Manual of UG, George Mathew,5th Edition, page no : 98.', 'role': 'assistant'}]