Given ionisation enthalpy of element \({\mathrm{E}}_{(\mathrm{g})}\) is 300 kJ / mol and electron gain enthalpy of A,B,C…

Given ionisation enthalpy of element \({\mathrm{E}}_{(\mathrm{g})}\) is 300 kJ / mol and electron gain enthalpy of A,B,C and D gases atoms are -320 kJ / mol,-340 kJ / mol ,-200 kJ / mol and -250 kJ / mol, then what will be the correct order of ionic nature of compounds?