Sulphur dioxide on reaction with chlorine in the presence of charcoal gives compound (A). This on reaction with white phosphorus gives $\mathrm{SO}_2$ and compound (B). The correct statement about ' B ' is

• A

  The shape of ' B ' is pyramidal
• B

  'B' on hydrolysis gives phosphorus acid
• Correct answer
  C

  ' $B$ ' in solid state exists as an ionic solid
• D

  In ' B ' all bonds are equivalent

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