a + ib > c + id can be explained only when
b = 0, c = 0
b = 0, d = 0
a = 0, c = 0
a = 0, d = 0
We cannot compare 2 complex numbers as they have imaginary parts.
a + ib > c + id can be defined if and only if imaginary parts are zero.
i.e., so, b =0, d = 0