Paragraph: The reactions of $\mathrm{Cl}_{2}$ gas with cold-dilute and hot-concentrated $\mathrm{NaOH}$ in water give sodium salts of two (different) oxoacids of chlorine, $\boldsymbol{P}$ and $\boldsymbol{Q}$, respectively. The $\mathrm{Cl}_{2}$ gas reacts with $\mathrm{SO}_{2}$ gas, in presence of charcoal, to give a product $\boldsymbol{R}$. $\boldsymbol{R}$ reacts with white phosphorus to give a compound $\boldsymbol{S}$. On hydrolysis, $\boldsymbol{S}$ gives an oxoacid of phosphorus, $\boldsymbol{T}$.
Question: $P$ and $Q$, respectively, are the sodium salts of

• Correct answer
  A

  Hypochlorous and chloric acids
• B

  Hypochlorus and chlorous acids
• C

  Chloric and perchloric acids
• D

  Chloric and hypochlorous acids

Hence, the correct answer is option: 'A'.