Given below are two statements.
Statement-$I$: Elimination of particular alleles from a population due to natural disasters is called genetic drift.
Statement-$II$: Sudden temporary heritable change in the gene is called point mutation.
In the light of above statements,choose the most appropriate answer from the options given below:

• A
  Statement-$I$ is correct but Statement-$II$ is incorrect.
• B
  Both Statement-$I$ and Statement-$II$ are incorrect.
• C
  Both Statement-$I$ and Statement-$II$ are correct.
• D
  Statement-$I$ is incorrect but Statement-$II$ is correct.