A point Q lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of Q from the dipole is r(much larger than the size of the dipole), then the electric field at Q is proportional to
Options:
(a) `p^(-1) and r^(-2)`
(b) `p and r^(-2)`
(c) `p^2 and r^(-3)`
(d) `p and r^(-3)`