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

Options

A. Ionisation enthalpy increases for each successive electron.
B. The greatest increase in ionisation enthalpy is experienced on removal of electron from core noble gas configuration
C. End of valence electrons is marked by a big jump in ionisation enthalpy.
D. Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value.

Explanation

Statement (d) is incorrect. Removal of electron from an orbital having higher n value is easier because the electron to be removed is farther from the nucleus.