For a short dipole placed at origin O, the dipole moment is along x-axis, as shown in the figure. If the electric potential and electric field at A are $$V_{\circ}$$ and $$E_{\circ}$$, respectively, then the correct combination of the electric potential and electric field, respectively, at point B on the -axis is given by

A

$$V_{\circ}\text{ and }\frac{E_{\circ}}{4}$$

B

$$zero\text{ and }\frac{E_{\circ}}{16}$$

C

$$zero\text{ and }\frac{E_{\circ}}{8}$$

D

$$\frac{V_{\circ}}{2}\text{ and }\frac{E_{\circ}}{16}$$