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': 'A chloride level of--is said to be acceptable by WHO: \nSelect and explain. \nA. 0.2 mg/L, B. 0.5 mg/L, C. 45 mg/L, D. 200 mg/L', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 200 mg/L', 'role': 'assistant'}]