Which of the following sequence of reactions (reagents) can be used for the conversion of C₆H₅CH₂CH₃ into C₆H₅CH=CH₂?

To convert 1 phenylethane to 1 phenylethene . First, we need to treat 1 phenylethane with 2 2 SO Cl then followed by the alcoholic KOH. The following reaction is shown below: Hence, the correct option is (b).