c
\((A)\) \(Br^{\ominus}\) is best \(L.G.\) than \(\begin{matrix}
   O  \\
   ||  \\
   -O-C-Me  \\
\end{matrix}\)

\((B)\) \(SH^{\ominus}\) is best \(Nu^{\ominus}\) than \(MeSH\)

\((C)\) \(Cl^{\ominus}\) is best \(Nu^{\ominus}\) than \(I^{\ominus}\) in \(DMSO\)

\((D)\) In polar protic solvent \(I^{\ominus}\) is better \(Nu^{\ominus}\) than \(Cl^{\ominus}\)