Amongst the following, the strongest base in aqueous medium is

Options

A. `CH_(3)NH_(2)`
B. `NC CH_(2)NH_(2)`
C. `(CH_(3))_(2)NH`
D. `C_(6)H_(5)NHCH_(3)`

Answer

C

Explanation

`2^(@)` Amines are more basic than `1^(@)`, i.e., `(CH_(3))_(2)NH` is more basic than `CH_(3)NH_(2)`. Due to -1-effect of CN group, `NC CH_(2),NH_(2)` is less basic than even `CH_(3)CH_(2).C_(6)H_(5)NHCH_(3)` is less basic than both `CH_(3)NH_(2)` and `(CH_(3))_(2)NH` due to delocalization of lone pair of electrons on the N-atom into the benzene ring.