The correct order of radii is: (a) \( \mathrm{N}\mathrm{Be}\mathrm{B} \) (b) \( \mathrm{F}^{-}\m...

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The correct order of radii is:
(a) \( \mathrm{N}\mathrm{Be}\mathrm{B} \)
(b) \( \mathrm{F}^{-}\mathrm{O}^{2-}\mathrm{N}^{3-} \)
(c) \( \mathrm{Na}\mathrm{Li}\mathrm{K} \)
(d) \( \mathrm{Fe}^{3+}\mathrm{Fe}^{2+}\mathrm{Fe}^{4+} \)
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