AIIMS 2018 Chemistry Ionization Enthalpy Assertion Reason Question

Option B is correct because both the assertion and reason are true: it is indeed more difficult to remove an electron from a positively charged ion compared to a neutral atom, leading to a higher second ionization enthalpy than the first. However, the reason provided does not directly explain the assertion, as the ease of losing an electron is influenced by factors like effective nuclear charge and electron shielding, rather than just ionization energy alone. Option A is incorrect because the reason does not correctly explain the assertion, while options C and D are incorrect since both statements are true.