A coloured compound is formed when $\mathrm{M}\mathrm{n}{\mathrm{O}}_2$ is fused with $\mathrm{K}\mathrm{O}\mathrm{H}$ , the compound and its colour is

• Correct answer
  A

  ${\mathrm{K}}_2\mathrm{M}\mathrm{n}{\mathrm{O}}_4$ , purple green
• B

  $\mathrm{K}\mathrm{M}\mathrm{n}{\mathrm{O}}_4$ , purple
• C

  $\mathrm{M}{\mathrm{n}}_2{\mathrm{O}}_3$ , brown
• D

  $\mathrm{M}{\mathrm{n}}_3{\mathrm{O}}_4$ black

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