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Which is the correct electron dot structure of ${N_2}O$ molecule

• A
  $:\,N = N = \mathop O\limits_{.\,.}^{.\,.} $
• ✓
  $:\,N \equiv {N^ + } - \mathop O\limits_{.\,.}^{.\,.} {:^ - }$
• C
  $\mathop N\limits_{.\,.}^{.\,.} = \mathop N\limits^{.\,.} = \mathop O\limits_{.\,.}^{.\,.} $
• D
  $:\,N = N = \mathop O\limits_{.\,.}^{.\,.} :$