Columns 1, 2 and 3 contain starting materials, reaction conditions, and type of reactions, respectively:
Column 1Column 2Column 3(I) Toluene(i) NaOH/Br2(P) Condensation(II) Acetophenone(ii) Br2/hv(Q) Carboxylation(III) Benzaldehyde(iii) (CH3CO)2O/CH3COOK(R) Substitution(IV) Phenol(iv) NaOH/CO2(S) HaloformThe only CORRECT combination that gives two different carboxylic acids is: