Which of the following happens when $\text{N}{{\text{H}}_{4}}\text{OH}$ is added gradually to the solution containing 1 M ${{\text{A}}^{{2+}}}$ and ions?
Given : ${{\text{K}}_{{\text{sp}}}}\left[ {\text{A}{{{(\text{OH})}}_{2}}} \right]=9\times {{10}^{{-10}}}$ and ${{\text{K}}_{{\text{sp}}}}\left[ {\text{B}{{{(\text{OH})}}_{3}}} \right]=27\times {{10}^{{-18}}}$ at 298 K.