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
Daily requirement of sodium in an adult is 
Select and explain. 
A. 30-40 mM, B. 50-90 mM, C. 80-120 mM, D. 120 -150 mM
B: 50-90 mM
Answer: B: 50-90 mM 
Explanation: 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