Among statements $\left(\mathrm{a}\right)-\left(\mathrm{d}\right)$, the correct ones are:
$\left(\mathrm{a}\right)$ Decomposition of hydrogen peroxide gives di-oxygen.
$\left(\mathrm{b}\right)$ Like hydrogen peroxide, compounds, such as $\mathrm{K}\mathrm{C}\mathrm{l}{\mathrm{O}}_3,\mathrm{P}\mathrm{b}\left(\mathrm{N}{\mathrm{O}}_3\right)$ and ${\mathrm{N}\mathrm{a}\mathrm{N}\mathrm{O}}_3$ When heated liberate di-oxygen.
$\left(\mathrm{c}\right)$ $2$-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide.
$\left(\mathrm{d}\right)$ Hydrogen peroxide is used for the manufacture of sodium perborate.

• Correct answer
  A

  $\left(\mathrm{a}\right),\left(\mathrm{b}\right),\left(\mathrm{c}\right)$ and $\left(\mathrm{d}\right)$
• B

  $\left(\mathrm{a}\right),\left(\mathrm{b}\right),$ and $\left(\mathrm{c}\right)$ only
• C

  $\left(\mathrm{a}\right),\left(\mathrm{c}\right),$ and $\left(\mathrm{d}\right)$ only
• D

  $\left(\mathrm{a}\right)$ and $\left(\mathrm{c}\right)$ only

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