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 test hepatic function to assess bleeding disorder clinical test done is: \nSelect and explain. \nA. CT, BT, B. PTT, C. Factor 8, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: PTT', 'role': 'assistant'}]