$S_N1$ પ્રતિક્રિયાનો સાચો ક્રમ કયો છે?
$3^o > 2^o > 1^o >$ Methyl ($S_N1$ reactivity)
$(I)\,\begin{array}{*{20}{c}}
{C{H_3}CHC{H_2}C{H_3}} \\
{|\,\,\,\,\,\,\,\,\,\,\,} \\
{Cl\,\,\,\,\,\,\,\,\,}
\end{array}$
$(II)\,CH_3CH_2CH_2Cl$
$(III)\,H_3CO-C_6H_4-CH_2Cl$