Which one of the following statements is incorrect in relation to ionization enthalpy?

The option (d) represents an incorrect statement. It states that "Removal of an electron from orbitals bearing a lower n value is easier than from an orbital having a higher n value". The correct statement is "Removal of an electron from orbitals bearing a lower n value is more difficult than from an orbital having a higher n value". The attraction between the nucleus and the electron present in an orbital having a lower n value is higher than the attraction between the nucleus and the electron present in an orbital having a higher n value.