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# The correct order of increasing basic strength of bases $NH_3, CH_3NH_2\: and\: (CH_3)_2NH$ is

$\begin {array} {1 1} (A)\;CH_3NH_2 < NH_3 < (CH_3)_2NH & \quad (B)\;(CH_3)_2NH < NH_3 < CH_3NH_2 \\ (C)\;NH_3 < CH_3NH_2 < (CH_3)_2NH & \quad (D)\;CH_3NH_2 < (CH_3)_2NH < NH_3 \end {array}$

in this compound 2 methyl group phushes electrons towards Nitrogen through $+I$ effect and increases the basic strength
Ans : (C)