What Is the Nucleophile in the Following Reaction?
I $\mathrm { H } _ { 2 } \mathrm { O }$

What is the nucleophile in the following reaction?
I.


II. $\mathrm { H } _ { 2 } \mathrm { O }$

III. $\mathrm { H } _ { 3 } \mathrm { O } ^ { \oplus }$

IV. $\mathrm { I } ^ { \ominus }$

V. $\mathrm { HO } ^ { \ominus }$

A) I
B) II
C) III
D) IV
E) V