Point out the correct statement.

• A

  Below $710^{\circ} \mathrm{C}, \mathrm{C}$ is better reducing agent than CO
• Correct answer
  B

  Below $710^{\circ} \mathrm{C}, \mathrm{CO}$ is better reducing agent than C
• C

  Below $710^{\circ} \mathrm{C}, \mathrm{CO}$ is an oxidising agent
• D

  Below $710^{\circ} \mathrm{C}, \mathrm{CO}_2$ is a reducing agent

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