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Which one of the following orders presen...

Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides?

A

`A1_2O_3ltMgOltNa_2OltK_2O`

B

`MgOltK_2OltA1_2O_3ltNa_2O`

C

`Na_2OltK_2OltMgOltA1_2O_3`

D

`K_2OltNa_2OltA1_2O_3ltMgO`

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