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In $\mathrm{SO}_{2}, \mathrm{NO}_{2}^{-}$and $\mathrm{N}_{3}^{-}$the hybridizations at the central atom are respectively :

• A
  $\mathrm{sp}^{2}, \mathrm{sp}^{2}$ and sp
• B
  $\mathrm{sp}^{2}, \mathrm{sp}$ and sp
• C
  $\mathrm{sp}^{2}, \mathrm{sp}^{2}$ and $\mathrm{sp}^{2}$
• D
  $\mathrm{sp}, \mathrm{sp}^{2}$ and sp