(a) The flux of the electric field through the sphere is zero.(c) The electric field is not zero anywhere on the sphere.The sphere encloses a dipole, i.e. two equal and opposite charges. In other words, net charge enclosed in the sphere is zero. Hence, the flux is zero through the sphere.But the electric field at any point p on the sphere,E=4πϵ0​1​r3p​3cos2θ+1​, where θ is the angle made by the point p with the centre of the dipole. Hence, we can see that the field is not zero anywhere on the sphere.