Which one of the following reagents is not suitable for the elimination reaction ?<p>

Question

$\begin{array}{1 1}(1)\; NaOH\;/\;H_2O\\ (2)\; NaOEt \;/\;EtOH \\(3)\; NaOH\;/\;H_2O-EtOH\\ (4)\; NaI \end{array}$