When copper is heated with conc. $\mathrm{H}\mathrm{N}{\mathrm{O}}_3$ it produces:

• Correct answer
  A

  $\mathrm{C}\mathrm{u}{\left(\mathrm{N}{\mathrm{O}}_3\right)}_2$ and $\mathrm{N}{\mathrm{O}}_2$
• B

  $\mathrm{C}\mathrm{u}{\left(\mathrm{N}{\mathrm{O}}_3\right)}_2$ and $\mathrm{N}\mathrm{O}$
• C

  $\mathrm{C}\mathrm{u}{\left(\mathrm{N}{\mathrm{O}}_3\right)}_2,\mathrm{N}\mathrm{O}$ and $\mathrm{N}{\mathrm{O}}_2$
• D

  $\mathrm{C}\mathrm{u}{\left(\mathrm{N}{\mathrm{O}}_3\right)}_2$ and ${\mathrm{N}}_2\mathrm{O}$

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