Match the test in Column I with the observation in Column II. Column I: (P) phenol heated with phthalic anhydride and conc. $\mathrm{H}{}_2\mathrm{SO}{}_4$, then made alkaline with dilute $\mathrm{NaOH}$; (Q) ethane-1,2-diol treated with $\mathrm{HIO}{}_4$ and then aqueous $\mathrm{AgNO}{}_3$; (R) butan-2-ol shaken with $\mathrm{ZnCl}{}_2$/conc. $\mathrm{HCl}$ at room temperature; (S) ethanol warmed with $\mathrm{I}{}_2/\mathrm{NaOH}$. Column II: (1) yellow precipitate with antiseptic smell; (2) pink solution; (3) white precipitate; (4) cloudiness after about 5 minutes.

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