Match the species in List I with the correct description in List II. List I: (P) $\mathrm{Cl}$ first electron gain; (Q) $\mathrm{Ne}$ first electron gain; (R) $\mathrm{Be}$ first electron gain; (S) $\mathrm{O}{}^{-}$ electron gain. List II: (1) positive, because the $2s$ subshell is full; (2) positive, because of repulsion in an anion; (3) positive, because the valence shell is a complete octet; (4) among the most negative values in the periodic table.

1. AP-3, Q-4, R-1, S-2
2. BP-4, Q-1, R-3, S-2
3. CP-4, Q-3, R-2, S-1
4. DP-4, Q-3, R-1, S-2