(I) (iv) (Q)
(IV) (ii) (P)
(II) (i) (S)
(III) (iv) (R)
For the synthesis of benzoic acid, the only CORRECT combination is (II) Acetophenone (i)NaOH/Br2(S) Haloform reaction. Acetophenone reacts with NaOH/Br2 to undergo a haloform reaction, producing sodium benzoate. Acidification of sodium benzoate yields benzoic acid.