Which of the following has the least electron affinity in $kJ\,mol^{-1}$?

Assertion $(A)$: Fluorine has a smaller negative electron gain enthalpy than chlorine.
Reason $(R)$: The electron-electron repulsion is higher in chlorine than in fluorine.

The second electron gain enthalpy of an element:

The correct order of increasing electron affinity of the following elements is

Which of the following elements have the highest and lowest electron gain enthalpy,respectively?

Fluorine has lower electron affinity than chlorine because of