The order of basic strength of $C_6H_5NH_2$ (1), $C_2H_5NH_2$ (2), $(C_2H_5)_2NH$ (3) and $NH_3$ (4) is :

Question

$\begin {array} {1 1} (1)\;1 < 4< 2< 3 & \quad (2)\;1 < 3< 2< 4 \\ (3)\;4 < 2< 3< 1 & \quad (4)\;3 < 2< 4< 1 \end {array}$