The dissolution of $\mathrm{A}\mathrm{l}(\mathrm{O}\mathrm{H}{)}_3$ by a solution of $\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}$ results in the formation of:

• A

  $\left[\mathrm{A}\mathrm{l}\right({\mathrm{H}}_2\mathrm{O}{)}_4(\mathrm{O}\mathrm{H}{)}_2{]}^{+}$
• B

  $\left[\mathrm{A}\mathrm{l}\right({\mathrm{H}}_2\mathrm{O}{)}_3\left(\mathrm{O}\mathrm{H}{)}_3\right]$
• Correct answer
  C

  $\left[\mathrm{A}\mathrm{l}\right({\mathrm{H}}_2\mathrm{O}{)}_2(\mathrm{O}\mathrm{H}{)}_4{]}^{-}$
• D

  $\left[\mathrm{A}\mathrm{l}\right({\mathrm{H}}_2\mathrm{O}{)}_6\left(\mathrm{O}\mathrm{H}{)}_3\right]$

Hence, the correct answer is option: 'C'.