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# Chief source of soil and water pollution is

$\begin{array}{1 1}(a)\;\text{Agro industry}\\(b)\;\text{Thermal power plant}\\(c)\;\text{Mining}\\(d)\;\text{All the above}\end{array}$

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A)
Chief source of soil and water pollution is agro industry,thermal power plant,mining.
Hence (d) is the correct answer.