Which Nucleophilic Substitution Reaction Is Not Likely to Occur?
A)I^- $\to$

Which nucleophilic substitution reaction is not likely to occur?

A) I^-+ CH₃CH₂-Cl $\to$ CH₃CH₂-I + Cl^-
B) I^- + CH₃CH₂-Br $\to$ CH₃CH₂-I + Br^-
C) I^- + CH₃CH₂-OH $\to$ CH₃CH₂-I + OH^-
D) CH₃O^-+ CH₃CH₂-Br $\to$ CH₃CH₂-OCH₃ + Br^-
E) OH^-+ CH₃CH₂-Cl $\to$ CH₃CH₂-OH + Cl^-