In the reaction ${\text{PCl}}_3+{\text{Cl}}_2⟶{\text{PCl}}_5$, which of the following is correct?

• Correct answer
  A

  ${\mathrm{PCl}}_3$ is acting as a reductant.
• B

  ${\mathrm{Cl}}_2$ is acting as a reductant.
• C

  Both ${\mathrm{PCl}}_3$ and ${\mathrm{Cl}}_2$ are acting as reductants.
• D

  Both ${\mathrm{PCl}}_3$ and ${\mathrm{Cl}}_2$ are acting as oxidants.

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