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UPSC Prelims GS - 2022
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Question 100
EASY
Correct: +2
Incorrect: -2
Consider the following:
1. Carbon monoxide
2. Nitrogen oxide
3. Ozone
4. Sulphur dioxide
Excess of which of the above in the environment is/are cause(s) of acid rain?
a
1, 2 and 3
b
2 and 4 only
c
4 only
d
1, 3 and 4
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