Identify the option that represents the correct configuration of electric field lines due to a combination of one positive and one negative charge.

A charge $q$ is placed at $O$ in the cavity in a spherical uncharged conductor. Point $S$ is outside the conductor. If the charge is displaced from $O$ towards $S,$ still remaining within the cavity,

Assertion: No two electric lines of force can intersect each other.

Reason: Tangent at any point of electric line of force gives the direction of electric field.

Two infinitely large charged planes, having uniform surface charge density $+\sigma$ and $-\sigma$ respectively, are placed along the $x-y$ plane and the $y-z$ plane respectively as shown in the figure. Then the nature of electric lines of forces in $x-z$ plane is given by

The figure below shows field lines of an electric field. The spacing between the lines parallel to the page is same everywhere. If the magnitude of the field at $A$ is $40 \mathrm{N} {\mathrm{C}}^{-1}$, then the magnitude of the field at $B$ is approximately,