This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
[{'content': 'Maximum permissible chloride level is - \nSelect and explain. \nA. 200 mg\\/litre, B. 300 mg\\/litre, C. 500 mg\\/litre, D. 600 mg\\/litre', 'role': 'user'}, {'content': "Answer: D \nExplanation: Park's textbook of preventive and social medicine 23rd edition. *The standard prescribed for chloride is 200 mg/l,the maximum permissible level is 600mg/l.", 'role': 'assistant'}]