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: Surgery
[{'content': 'Half life of factor 8 is - \nSelect and explain. \nA. 4 hours, B. 8 hours, C. 34 hours, D. 48 hours', 'role': 'user'}, {'content': 'Answer: B \nExplanation: T1/2 of factor 8 is between 6-12 hrs.', 'role': 'assistant'}]