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# Consider the basic strength of amines in aqueous solution,which one has the smallest $pK_b$ value?

$\begin{array}{1 1}(A)\;(CH_3)_3N\\(B)\;C_6H_5NH_2\\(C)\;(CH_3)_2NH\\(D)\;CH_3NH_2\end{array}$

$(CH_3)_2NH$
Hence (C) is the correct answer.