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Which one of the following statements is...

Which one of the following statements is correct

A

At present it is not possible to grow maize without chemical fertilizers

B

Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.

C

Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants

D

Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in soil

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