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': 'Normal Prothrombin Time is? \nSelect and explain. \nA. 5 Second, B. 5-8 Second, C. 11-15 Second, D. 20-25 Second', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]