A) Cotton
B) gram
C) Mustard
D) wheat
Correct Answer: B
Solution :
Leguminous plants such as grams, beans, peas soyabeans, peanuts, alfa-alfa and clover contains root nodules. Later are formed due to symbiotic association between roots of leguminous plants and bacterium Rhizobium. The plants furnishes anaerobic conditions and growth nutrients for the bacteria and the bacteria fix nitrogen to the plant.
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