Conectrated aqueous sodium hydroxide can be a separated mixture of

Options

A. `Al^(3+)` and `Sn^(2+)`
B. `Al^(3+)` and `Fe^(+3)`
C. `Al^(3+)` and `Zn^(2+)`
D. none of these

Answer

2

Explanation

`Al(OH)_(3)+NaOH rarr underset("sod. metaaluminate.")(NaAlO_(2))+2H_(2)O.`
`Fe(OH)_(3)+NaOH rarr "insoluble"`