Given below are two statements:

Statement I: During Electrolytic refining, the pure metal is made to act as anode and its impure metallic form is used as cathode.
Statement II: During the Hall-Heroult electrolysis process, purified ${\mathrm{Al}}_2{\mathrm{O}}_3$ is mixed with ${\mathrm{Na}}_3{\mathrm{AlF}}_6$ to lower the melting point of the mixture.
In the light of the above statements, choose the most appropriate answer from the options given below:

• Correct answer
  A

  Statement I is incorrect but Statement II is correct
• B

  Both Statement I and Statement II are incorrect
• C

  Statement I is correct but Statement II is incorrect
• D

  Both Statement I and Statement II are correct

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