Which of the following pairs of elements do not follow \( \mathrm{P...

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Which of the following pairs of elements do not follow
\( \mathrm{P} \) octave rule -

W.
(1) \( \mathrm{Na}, \mathrm{K} \)
(2) \( \mathrm{Ca}, \mathrm{Sr} \)
(3) \( \mathrm{F}, \mathrm{Cl} \)
(4) O, \( \mathrm{S} \)
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