What is the correct order of electron affinity for the elements of the oxygen group in the periodic table?

Correct order of electron affinity for $C$,$Si$,and $Ge$ is

Which elements show an anomalous trend in the negative value of electron gain enthalpy within their respective groups?

The electron gain enthalpy values (in $kJ \ mol^{-1}$) of three halogens $X$,$Y$ and $Z$ are respectively $-349$,$-333$ and $-325$. Then $X$,$Y$ and $Z$ are respectively

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

Which of the following processes involves absorption of energy?