$\quad\quad\quad\quad\quad\quad3 {~s}\quad\quad \quad 2 {~s}$
${~K}_{{sp}}=(3 {~s})^{3}(2 {~s})^{2}$
${~K}_{{SP}}=108 {~S}^{5} \& {~s}=({X} / {M})$
${K}_{{SP}}=108\left(\frac{{x}}{{m}}\right)^{5}$
$\text { given } {K}_{{SP}}={a}\left(\frac{{x}}{{m}}\right)^{5}$
comparing a $=108$
$A = NH_4Cl$; $ B = CH_3COONa$; $ C = NH_4OH$; $D = CH_3COOH$