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': 'Which of the following is the best method to assess the adequacy of replacement - \nSelect and explain. \nA. Decrease in thirst, B. Increase in urine output, C. Blood pressure, D. Increased PaO2', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]