The correct order of decreasing electronegativity values among the elements beryllium (I), oxyge...

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The correct order of decreasing electronegativity values among the elements beryllium (I), oxygen (II), nitrogen (III) and magnesium (IV) is:
(A) (II) \( ( \) III \( )( \) I \( ) \) (IV)
(B) \( (\mathrm{III})( \) IV \( )( \) II \( )( \) I \( ) \)
(C) \( (\mathrm{I})(\mathrm{II})(\mathrm{III})(\mathrm{IV}) \)
(D) \( (\mathrm{I})(\mathrm{II})(\mathrm{IV})(\mathrm{III}) \)
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