An electric field of 1000 V/m is applied to an electric dipole at an angle of 45°. The value of the electric dipole moment is 10^–29 Cm. What is the potential energy of the electric dipole

(a) –10 × 10^–29 J

(b) –7 × 10^–27 J

(c) –20 × 10^–18 J

(d) –9 × 10^–20 J