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Match the column
Column-I Column-II
a Ozone thickness i U.V. rays
b CFCs ii Refrigerator
c Skin cancer iii Temperature increase
d EI Nino effect iv Dobson unit
a b c d
1 iv ii i iii
2 ii iv i iii
3 ii iv iii i
4 i ii iii iv

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answer is A.

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Detailed Solution

Ozone thickness is measured in Dobson units.

Refrigerators are one of the sources of CFCs.

Skin cancer can be caused due to exposure to UV rays (ozone depletion).

EI Nino effect is a result of global warming (increase in temperature).

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