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': 'WHO ORS composition are (mmol) - \nSelect and explain. \nA. Glucose - Ill, B. K+ - 80, C. Na+ - 20, D. None', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'None'", 'role': 'assistant'}]