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MPPSC Prelims 2018Paper-IQ. 4 of 200
Q. 41 markMedium
MPPSC Prelims 2018·Paper-I
The main air pollutant(s) in metropolitan cities is/are
(a)O₃
(b)CO and SO₂
(c)CO₂ and NO₂
(d)None of the above
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The main air pollutant(s) in metropolitan cities is/are