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Which of the following is best indicator of $SO_2$ pollution:-

$\begin{array}{1 1}(a)\;\text{Bryophyte}\\(b)\;\text{Pteridophytes}\\(c)\;\text{Lichen}\\(d)\;\text{Algae}\end{array} $

1 Answer

Best indicator of $SO_2$ pollution is lichen
Hence (c) is the correct answer.
answered Mar 28, 2014 by sreemathi.v
 
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