This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Daily requirement of sodium in an adult is \nSelect and explain. \nA. 30-40 mM, B. 50-90 mM, C. 80-120 mM, D. 120 -150 mM', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The following are the approximate daily requirements of some electrolytes in adults:sodium: 50-90 mM/daypotassium: 50 mM/daycalcium: 5 mM/daymagnesium: 1 mM/dayRef: Bailey and Love 27e pg: 281', 'role': 'assistant'}]