This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bleeding disorder, Subject name: Pathology
[{'content': 'Hemophilia B is due to deficiency of: \nSelect and explain. \nA. Factor VIII, B. Factor VII, C. Factor IX, D. Factor X', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hemophilia B -Aka Christmas disease -Deficiency of Factor 9 -X linked recessive Disorder Deficiency Hemophilia A Hemophilia B Hemophilia C Parahemophilia Factor 8 Factor 9 Factor 11 Factor 5', 'role': 'assistant'}]