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': "Deficiency of all the three components of coagulation factor VIII result in: \nSelect and explain. \nA. Von wifiebrand's disease, B. Haemophilia - A, C. Parahemophilia, D. Haemophilia - B", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]