Aniline $\rightarrow \mathrm{Ph}-\mathrm{NH}_{2}$, $(\mu=1.59 \mathrm{D})$

Acetophenone $\rightarrow$ Ph-O-CH $_{3}$ ( $\mu=3.05 \mathrm{D}$ )

Dipole moment : ${C}>{A}>{B}$

Hence the sequence of obtained compounds is $(\mathrm{C})\;,(\mathrm{A})$ and $(\mathrm{B})$