The proces: of 'eutrophication' is due to (A) increase in concentration of insecticide in water ...

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The proces: of 'eutrophication' is due to
(A) increase in concentration of insecticide in water
(B) increase in concentration of fluoride ion in water
(C) the reduction in concentration of the dissolved oxygen in water due to phosphate pollution in water
(D) attack of younger leaves of a plant by peroxyacetyl nitrate
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