A) Chameleon
B) Lichens
C) Bengal Tiger
D) Biston betlaria
Correct Answer: B
Solution :
Lichens are considered as best indicators of industrial pollution, which are grown as pollution indicators as they are very sensitive to \[S{{O}_{2}}\]. Some lichens like Parmelia, Usnea and Cladonia as completely destroyed by \[S{{O}_{2}}\]. A rich growth of lichen indicates fresh atmospheric garden pea is another \[S{{O}_{2}}\] pollution indicator.
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