A) cotton
B) gram
C) mustard
D) wheat
Correct Answer: B
Solution :
Leguminous plants such as grams, beans, peas soya beans, peanuts, alfalfa and clover contain root nodules. Later are formed due to symbiotic association between roots of leguminous plants and bacterium Rhizobium. The plants furnish anaerobic conditions and growth nutrients for the bacteria and the bacteria fix nitrogen to the plant.
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