Which of the following reactions is an example of nucleophilic substitution reaction ?

A nucleophilic substitution reaction is a type of chemical reaction where a nucleophile (an electron-rich species) replaces a leaving group in a molecule. Typically, it involves the substitution of one functional group by another.

To determine which reaction qualifies as a nucleophilic substitution, it’s essential to look for the following characteristics:

1. Presence of a nucleophile.
2. A leaving group that is replaced by the nucleophile.

Common examples of nucleophilic substitution reactions include:

• The reaction of an alkyl halide with a hydroxide ion, where the hydroxide ion substitutes the halide ion.
• The reaction of an alcohol with hydrogen halides, resulting in alkyl halides.

Please provide the options you have, and I can help you identify which one is an example of a nucleophilic substitution reaction.