Which mixture can be separated by a concentrated aqueous solution of sodium hydroxide $(NaOH)$?
- A$Al^{3+}$ and $Sn^{2+}$
- B$Al^{3+}$ and $Fe^{3+}$
- C$Al^{3+}$ and $Zn^{2+}$
- D$Zn^{2+}$ and $Pb^{2+}$
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