Among the following


Among the following species which two have trigonal bipyramidal shape ?

(1) $\mathrm{NI}_{3}$

(2) $\mathrm{I}_{3}^{-}$

(3) $\mathrm{SO}_{3}^{2-}$

(4) $\mathrm{NO}_{3}^{-}$

  1. II and III

  2. III and IV

  3. I and IV

  4. I and III

Correct Option:


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