A) \[N{{O}_{3}}\]
B) \[N{{H}_{3}}\]
C) \[N{{O}_{2}}^{-}\]
D) Both (a) and (c)
Correct Answer: D
Solution :
Nitrogen in the atmosphere is about 79% but plants are unable to use atmospheric nitrogen. Plants take nitrogen mainly in the form of nitrates and nitrites. Nitrogen gas of atmosphere is converted into nitrates and nitrites by the process of nitrogen fixation.
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