Which of the following statements about ${\mathrm{H}}_2{\mathrm{O}}_2$ is not true ?

• A

  ${\mathrm{H}}_2{\mathrm{O}}_2$ is used to clean oil paintings

• B

  ${\mathrm{H}}_2{\mathrm{O}}_2$ acts as oxidising as well as reducing agent

• C

  Two hydroxyl groups in ${\mathrm{H}}_2{\mathrm{O}}_2$ lie in the same plane

• D

  It retains same structure in liquid and solid form