The correct order of basicity of the following compounds is

Options

A. `1 lt 2 lt 3 lt 4`
B. `1 lt 2 lt 4 lt 3`
C. `2 lt 1 lt 3 lt 4`
D. `4 lt 3 lt 2 lt 1`

Answer

C

Explanation

The basic strength order depends on (i) Accumulation of –ve charge on N (double bonded) by another `NH_(2)` group, thus intensifying the donor ability of N.
(ii) The higher donor ability of `sp^(3)` hybrid N as compared to `sp^(2)N`. Hence the order of basic strength is