A) \[S{{O}_{2}}\] pollution
B) noise pollution
C) soil pollution
D) water pollution
Correct Answer: A
Solution :
Lichens are very sensitive to \[S{{O}_{2}}\] pollution in air. Actually lichens are indicator of \[S{{O}_{2}}\]pollution. As soon as \[S{{C}_{2}}\] pollution occurs in air. Lichens start migrating from that place.
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