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: Pediatrics
[{'content': 'Molar concentration of oral rehydration fluid is - \nSelect and explain. \nA. Sodium 30 meq, B. Potassium 20 meq, C. Bicarbonate 30 meq, D. Chloride 20 meq', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Potassium 20 meq", 'role': 'assistant'}]