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# 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 :

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

(1) 238