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UPSC Prelims GS - 2019
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Question 95
MEDIUM
Correct: +2
Incorrect: -2
Consider the following:
1. Carbon monoxide
2. Methane
3. Ozone
4. Sulphur dioxide
Which of the above are released into atmosphere due to the burning of crop/biomass residue?
a
1 and 2 only
b
2, 3 and 4 only
c
1 and 4 only
d
1, 2, 3 and 4
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