Columns1, 2and3 ~contain starting materials, reaction conditions...

Columns1, 2and3~contain starting materials, reaction conditions and type of reactions respectively.<br />& <table border="1"> <tbody> <tr> <td>Column1 Column2$</td> <td>Column3$ $( I )$ Toulene $( i ){NaOH/Br}_{2}$ $( P )$ Condensation $( II )$ Acetophenone $( ii ){Br}_{2} / hv$ $( Q )$ Carboxylation $( III )$ Benzaldehyde $(iii)$~\left({CH}_{3}CO\right)2O / {CH}_{3}COOK$</td> <td>$( R )$Substitution</td> </tr> <tr> <td>$( IV )$Phenol</td> <td>$( iv )NaOH / {CO}_{2}$</td> <td>$( S ) Haloform The only CORRECT combination in which the reaction proceeds through radical mechanism is