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      Question

      Which of the following is a nitrogen-fixing

      bacteria?
      A Salmonella Correct Answer Incorrect Answer
      B Rhizobium Correct Answer Incorrect Answer
      C E.coli Correct Answer Incorrect Answer
      D Pseudomonas Correct Answer Incorrect Answer

      Solution

      Rhizobium is a nitrogen-fixing bacteria as it fixes nitrogen after it gets established in the root nodules of leguminous plants.

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