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:

1. A Statement $\mathrm{I}$ is correct but Statement II is incorrect
2. B Statement I is incorrect but Statement II is correct Correct answer
3. C Both Statement I and Statement II are incorrect
4. D Both Statement I and Statement II are correct