Correct Answer: Option D

Explanation

NO\(_{2} ^{-}\) = - 1

NO\(_{2}\) = - 1

N + (-2 x 2) = - 1

N - 4 = - 1

N = - 1 + 4 = + 3

IUPAC name of NO\(_{2} ^{-}\) is dioxonitrate(III) ion

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