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: Social & Preventive Medicine
[{'content': 'Sodium content in reduced osmolarity ORS is: September 2006 \nSelect and explain. \nA. 1.5 grams/liter, B. 2.5 grams/liter, C. 3.5 grams/liter, D. 4.5 grams/liter', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: 2.5 grams/liter', 'role': 'assistant'}]