Correct Answer - D
D, B, and E are are symetrical
to A, hence potential at these
points is same. Similarly , C,
F, and H are symmetrical
to G. So potential at these
points is the same.
Resulting diagram will be
as shown : C, D, F, and E will
be at the same potential.
Potential difference between
C and G will be half to the applied potential, i.e.,
`V_(CG) = 30//2 = 15V`