Step 1: Reactions.
Benzene + CH₃COCl/AlCl₃ (Friedel-Crafts acylation) → Acetophenone (PhCOCH₃).
Step 2: Acetophenone + NaOCl (Haloform reaction).
PhCOCH₃ + NaOCl → P (PhCOONa = Sodium benzoate) + Q (CHCl₃ = Chloroform).
Step 3: Option D verify.
P (PhCOONa) + H⁺ → PhCOOH (carboxylic acid). Q (CHCl₃) + air/light → COCl₂ (phosgene - ઝ. વ.).
\\[ \boxed{oxed{P = PhCOONa, Q = CHCl_3
ightarrow ext{Option D}} \} \]