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Which pair are free-living nitrogen-fixing bacteria in soil?
AAzospirillum and Azotobacter
BRhizobium and Glomus
CGlomus and Trichoderma
DBacillus and Lactobacillus
Answer & Solution
Correct answer: A. Azospirillum and Azotobacter
Azospirillum and Azotobacter fix atmospheric nitrogen while free-living in the soil.
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