A dielectric slab is filled in between the plates of parallel plate charged capacitor. Di- electric constant of the capacitor varies with x as $k=\frac{x}{d}{k}_0$.
Capacitor is not connected with the battery. Then choose the correct statement(s):-
 

Bound charge density inside the di-electric is non-uniform.

Bound charge density inside the di-electric is zero.

Net electric field inside the di-electric is uniform throughout the capacitor.

Net electric field inside the dielectric decreases on moving along x-direction inside the  capacitor.