Match the following column: Column I (1) Particulate matter (2) Methane (3) \( \mathrm{NO}_{2} \...

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Match the following column:
Column I
(1) Particulate matter
(2) Methane
(3) \( \mathrm{NO}_{2} \)
(4) \( \mathrm{CFCs} \)
Column II
(A) Air pollution
(B) Ozone hole
(C) Acid rain
(D) Global warming
a. 1-A 2-D 3-C 4-B
b. 1-D 2-C 3-B 4-A
c. 1-C 2-B 3-D 4-A
d. 1-B 2-C 3-D 4-A
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