Assertion :Manures and biofertilizers should be used in place of chemical fertilizers. Reason: Chemical fertilizers cause pollution by releasing excess nutrients in water bodies.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Chemical fertilizers contain an excess amount of nitrogen and phosphorous. These excess nutrients pollutes the water bodies when it rains and soil containing the nitrogen and phosphorous enters into the water bodies. So instead of chemical fertilizers, manures and bio-fertilizers should be used.

Hence, the correct answer is option $A$ .

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