The correct order of decreasing electronegativity values among the ...

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The correct order of decreasing electronegativity values among the elements I-beryllium, II-oxygen, III-nitrogen and IV-magnesium is :
(Kerala CEE 2011)
\( \mathrm{P} \)
(a) II \( \) III \( \) I \( \) IV
(b) III \( \) IV \( \) II \( \) I
W
(c) I \( \) II \( \) III \( \) IV
(d) I \( \) II \( \) IV \( \) III
(e) II \( \) III \( \) IV \( \) I
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