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Question
Among the following the odd pair is
Options
\[\ce{^18_8{O}}\], \[\ce{^19_9{F}}\]
\[\ce{^40_18{Ar}}\], \[\ce{^14_7{N}}\]
\[\ce{^30_14{Si}}\], \[\ce{^31_15{P}}\]
\[\ce{^40_20{Cr}}\], \[\ce{^39_19{K}}\]
Solution
\[\ce{^40_18{Ar}}\], \[\ce{^14_7{N}}\]
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