The absolute value of the electron gain enthalpy of halogens satisfies which of the following orders?

In which of the following processes is energy absorbed?

Column-$I$ shows the electronic configuration of some elements and Column-$II$ shows the values of electron gain enthalpy. Match these values correctly. Match the electronic configuration with the electron gain enthalpy.

Column-$I$ Electronic Configuration	Column-$II$ Electron Gain Enthalpy / $kJ \ mol^{-1}$
$(A) \ 1s^2 2s^2 2p^6$	$(1) -53$
$(B) \ 1s^2 2s^2 2p^6 3s^1$	$(2) -328$
$(C) \ 1s^2 2s^2 2p^5$	$(3) -141$
$(D) \ 1s^2 2s^2 2p^4$	$(4) +53$

The energy evolved is highest for which of the following reactions?

Which of the following is correct for the electron affinity of halogens?

Halogens have maximum negative electron gain enthalpy in the respective periods of the periodic table. Why?