This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Na+ content of ReSoMal (rehydration solution for malnourished children) \nSelect and explain. \nA. 30 mmol/L, B. 45 mmol/L, C. 60 mmol/L, D. 90 mmol/L', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ReSoMal is used for the preparation of an oral rehydration solution (ORS) exclusively for people suffering from severe acute malnutrition. It must be used under medical supervision in therapeutic feeding centres, and must not be given directly to families. To treat Severe Acute Malnutriton and address mineral deficiencies. Seriously malnourished children commonly suffer from a deficiency of potassium and various other mineral deficiencies, as well as from an abnormally high level of sodium. In the event of dehydration, it is therefore necessary to give them a specific ORS containing less sodium, more potassium and more magnesium, zinc and copper Ref :', 'role': 'assistant'}]