If the values of $\land_{\infty}$ of $NH_4CI,NaOH\: and \: NaCI$ are 130, 217 and 109 $ohm^{-1}\: .\: cm^2\: .\: equiv^{-1}$ respectively, the $\land_{\infty}$ of $NH_4OH$ in $ohm^{-1}\: .\: cm^2\: .\: equiv^{-1}$ is :

Question

$\begin {array} {1 1} (1)\;238 & \quad (2)\;196 \\ (3)\;22 & \quad (4)\;456 \end {array}$