A notation question:
The polar form of a complex number is r⋅exp(i⋅θ).

Which, if any, of these are in polar form?

A) 5⋅exp(2i)
B) 2⋅exp(i⋅π)
C) (4+√2)⋅exp(i)
D) exp((4+√2)⋅i)
E) exp(0i)
F) exp(0)
G) 1