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Which of the following sequences is correct for
\( \mathrm{P} \) decreasing order of ionic radius -

W.
(1) \( \mathrm{Se}^{-2}\mathrm{I}^{-}\mathrm{Br}^{-}\mathrm{O}^{-2}\mathrm{F}^{-} \)
(2) \( \mathrm{I}^{-}\mathrm{Se}^{-2}\mathrm{O}^{-2}\mathrm{Br}^{-}\mathrm{F}^{-} \)
(3) \( \mathrm{Se}^{-2}\mathrm{I}^{-}\mathrm{Br}^{-}\mathrm{F}^{-}\mathrm{O}^{-2} \)
(4) \( \mathrm{I}^{-}\mathrm{Se}^{-2}\mathrm{Br}^{-}\mathrm{O}^{-2}\mathrm{F}^{-} \)
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