NEET Physics Properties of Conductors Multiple Correct Question

Which statements are correct? (A) Inside a conductor electrostatic potential is zero. (B) At the surface of charge conductor electrostatic field must be normal to the surface at every point (C) The interior of a conductor can have no excess charge in the static situation (D) The electrostatic potential is constant throughout the volume of the conductor and has the same value(as inside) on it surface (E) Electric field at the surface of charge conductor is σ/ε₀. (F) Whatever be the charge and field configuration outside any cavity in a conductor remains shielded from outside electric influence