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': 'The maximum ozone concentration in polluted atmosphere is dependent on the concentration and ratio of nitrogen oxides and which one of the following- \nSelect and explain. \nA. Carbon monoxide, B. Lead, C. Volate organic compounds, D. Sulphur dioxide', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Valate organic compounds Ground level ozone is formed from Nitrogen Oxides (NO) and valati le organic compounds (VOC), e.g., Methane", 'role': 'assistant'}]