નીપજ $"P"$ શોધો.
$\begin{align}
(A)\,Nu+R-L\to \overset{\oplus }{\mathop{Nu}}\,-R+{{L}^{-}} \\
(B)\,R-{{L}^{\oplus }}\to {{R}^{\oplus }}+:L \\
\end{align}$
${C_2}{H_5}OH + SOC{l_2}\xrightarrow{{{\text{Pyridine}}}}{C_2}{H_5}Cl + S{O_2} + HCl$