Which of the statement(s) given about eutrophication is/are correct? (a) Eutrophication is the un...

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Which of the statement(s) given about eutrophication is/are correct?
(a) Eutrophication is the unnatural ageing of a water body by nutrient enrichment
(b) The accelerated ageing of lakes due to sewage and agricultural and industrial wastes is called cultural or accelerated eutrophication
(c) The plant nutrients responsible for eutrophication are nitrates and sulphates
(d) Phosphates and nitrates dacclerate the growth of algae which reduce oxygen utilisation and may oxygenate the water, enough to allow the fishes and other aquatic animals to thrive

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