Staements I: The amount of energy required to remove an average nucleon from different nuclei having different mass numbers is approximately the same, while to remove an average electron from atoms having different mass numbers widely varying amounts of energies are required.
Staements II: Nucleon in a nucleus are bounded by short-range nuclear force while elecrtons in an atom are bounded by lond-range Coulomb' force.

Answer

a

Explanation

As in a nucleus, nucleons are bounded by short-range nuclear force, so a given nucleon is in interaction only with neighboring nucleons. So, detaching a nucleon from a nucleus in the nucleus. Moreover, due to short-range nuclear force only, the `E_b//A` versus A curve is slowly varying for `A gt 40`.
While in atoms electrons are bound with nucleus by Coulomb's force which is a long-range force and depends on the number of protons in the nucleus and electron separation from the nicleus. If we take the average of the energies required to detach all the electons from the outermost shell to the innermost K shell, then this average increasing rapidly with incerease in atomic number.