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: Physiology
[{'content': 'Which of the following is anti-hemophillic factor B? \nSelect and explain. \nA. Factor I, B. Factor VIII, C. Factor XI, D. Factor IX', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]