The dibasic oxoacid of phosphorus on disproportionation gives two products A and B. $A$ and $B$ are respectively

• A

  $\mathrm{HPO}_3, \mathrm{PH}_3$
• B

  $\mathrm{H}_3 \mathrm{PO}_2, \mathrm{H}_2 \mathrm{O}$
• Correct answer
  C

  $\mathrm{H}_3 \mathrm{PO}_4, \mathrm{PH}_3$
• D

  $\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_6, \mathrm{H}_3 \mathrm{PO}_2$

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