Which of these ion is expected to be coloured in aqueous solution? [I] `Fe^(3+)` [II| `Zn^(2+)` [III] `Al^(3+)` [IV] `Sc^(3+)`

Which of these ion is expected to be coloured in aqueous solution?
[I] `Fe^(3+)`
[II| `Zn^(2+)`
[III] `Al^(3+)`
[IV] `Sc^(3+)`
A. [I] only
B. [III] only
C. [I] and [II] only
D. [I],[II] and [III]

Which of these ion is expected to be coloured in aqueous solution? [I] `Fe^(3+)` [II| `Zn^(2+)` [III] `Al^(3+)` [IV] `Sc^(3+)`

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