Question
Match the column?
| Column $-I$ | Column $-II$ |
| $(A)$ Ionisation potential | $(P)\; O < F < N$ |
| $(B)$ Electronegativity | $(Q)\; N < O < F$ |
| $(C) \;Z_{eff}$ | $(R) \;O < N < F$ |
| $(D)$ Electron affinity | $(S)\; N < C< O$ |
