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': 'All are used for monitoring of air pollution except? \nSelect and explain. \nA. Haze coefficient, B. Air pollution index, C. Smoke index, D. Kanawati index', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Kanawati index Monitoring of air pollution Monitoring of air pollution is done by : - Sulphur dioxide. Gritt and dust measurement. Co-efficient of haze. Air pollution index. Smoke or soiling index", 'role': 'assistant'}]