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Which are free-living nitrogen-fixing bacteria in soil?
ANostoc and Anabaena
BAzospirillum, Azotobacter
CRhizobium and Glomus
DGlomus and Nostoc
Answer & Solution
Correct answer: B. Azospirillum, Azotobacter
Azospirillum and Azotobacter fix nitrogen while living freely in the soil, enriching its nitrogen.
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