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The correct sequence which shows decreasing order
P of the ionic radii of the following :-

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(1) \( \mathrm{Al}^{3+}\mathrm{Mg}^{2+}\mathrm{Na}^{+}\mathrm{F}^{-}\mathrm{O}^{2-} \)
(2) \( \mathrm{Na}^{+}\mathrm{Mg}^{2+}\mathrm{Al}^{3+}\mathrm{O}^{2-}\mathrm{F}^{-} \)
(3) \( \mathrm{Na}^{+}\mathrm{F}^{-}\mathrm{Mg}^{2+}\mathrm{O}^{2-}\mathrm{Al}^{3+} \)
(4) \( \mathrm{O}^{2-}\mathrm{F}^{-}\mathrm{Na}^{+}\mathrm{Mg}^{2+}\mathrm{Al}^{3+} \)
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