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The correct stability order of the following
\( \mathrm{P} \) resonance structure is

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(I) \( \mathrm{H}_{2} \mathrm{C}=\stackrel{+}{\mathrm{N}}=\stackrel{-}{\mathrm{N}} \) (II) \( \mathrm{H}_{2} \stackrel{+}{\mathrm{C}}-\mathrm{N}=\stackrel{-}{\mathrm{N}} \)
(III) \( \mathrm{H}_{2} \stackrel{-}{\mathrm{C}}-\stackrel{+}{\mathrm{N}} \equiv \mathrm{N} \) (IV) \( \mathrm{H}_{2} \overline{\mathrm{C}}-\mathrm{N}=\stackrel{+}{\mathrm{N}} \)
(1) (I) \( \) (II) \( \) (IV) \( \) (III)
(2) (I) \( \) (III) \( \) (II) \( \) (IV)
(3) (II) \( \) (I) \( \) (III) \( \) (IV)
(4) (III) \( \) (I) \( \) (IV) \( \) (II)
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