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Which one of the following orders present the correct sequence of the increasing basic nature of the given oxides ?
\( \mathrm{P} \)
(a) \( \mathrm{Al}_{2} \mathrm{O}_{3}\mathrm{MgO}\mathrm{Na}_{2} \mathrm{O}\mathrm{K}_{2} \mathrm{O} \)
(b) \( \mathrm{MgO}\mathrm{K}_{2} \mathrm{O}\mathrm{Al}_{2} \mathrm{O}_{3}\mathrm{Na}_{2} \mathrm{O} \)
(c) \( \mathrm{Na}_{2} \mathrm{O}\mathrm{K}_{2} \mathrm{O}\mathrm{MgO}\mathrm{Al}_{2} \mathrm{O}_{3} \)
(d) \( \mathrm{K}_{2} \mathrm{O}\mathrm{Na}_{2} \mathrm{O}\mathrm{Al}_{2} \mathrm{O}_{3}\mathrm{MgO} \)
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