Which of the following is different from other three oxides? (a) \( \mathrm{MgO} \) (b) \( \math...

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Which of the following is different from other three oxides?
(a) \( \mathrm{MgO} \)
(b) \( \mathrm{SnO} \)
(c) \( \mathrm{ZnO} \)
(d) \( \mathrm{PbO} \)
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