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': 'To prevent excessive bleeding during surgery a patient\nwith hemophilia A may be given: \nSelect and explain. \nA. Whole blood, B. Fresh frozen plasma, C. Factor VIII concentrate, D. Factor IX concentrate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]