In the following reaction
$2 \mathrm{Na}(\mathrm{~s})+\mathrm{Cl}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{NaCl}(\mathrm{~s})$

• A

  $\mathrm{Na}(\mathrm{s})$ is oxidised and acts as an oxidising agent.
• B

  $\mathrm{Na}(\mathrm{s})$ is reduced and acts as an oxidising agent.
• C

  $\mathrm{Cl}_2(\mathrm{~g})$ is oxidised and acts as a reducing agent.
• Correct answer
  D

  $\mathrm{Cl}_2(\mathrm{~g})$ is reduced and acts as an oxidising agent.

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