The most stable resonating structure is

Options

A. `H_(2)N-overset(o+)(CH)-CH=CH-OCH_(3)`
B. `H_(2)overset(o+)N=CH-CH=CH-OCH_(3)`
C.
D. `NH_(2)-overset(o+)(C)H-overset(ɵ)(C)H-CH=overset(o+)(O)CH_(3)`

Answer

B

Explanation

In `(2)` octet of all atoms is complete and positive charge present on less electrongative atom.