The nitrobacter and nitrococcus

Options :
  1. oxidise nitrite to nitrate
  2. oxidise nitrate
  3. reduce nitrate
  4. none of these
Answer and Explanation :-

Answer: Option 1


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There's no clear water from a muddy well. All you can do is let the silt settle until the water clears otherwise it will taste sour. (paraphrased)
-Patrick Rothfuss The Wise Man's Fear