$[Nu^-=(A) \,PhO^-, (B)\,AcO^-, (C)\, HO^-, (D)\, CH_3O^-]$
The acid character follows the order:
\(-C H_{3} C O O H>C_{6} H_{5} O H>H_{2} O>C H_{3} O H\)
The basic character will follow the order
\(-C H_{3} C O O^{-} < C_{6} H_{5} O^{-} < O^{-} H < C H_{3} O\)

$(I)\,\,C{H_2} = CH - \mathop C\limits^ \oplus {H_2}$
$(II)\,\,C{H_3} - CH_2 - \mathop C\limits^ \oplus {H_2}$

$1. \,{H_3}C - \mathop O\limits^ + {H_2} \to CH_3^ + + {H_2}O$
$2.\,{(C{H_3})_3}C - \mathop O\limits^ + {H_2} \to {(C{H_3})_3}{C^ + } + {H_2}O$
$3.\,{(C{H_3})_2}CH - \mathop O\limits^ + {H_2} \to {(C{H_3})_2}C{H^ + } + {H_2}O$

