Given below are two statements.
Statement $I$: On heating with $KHSO_4$,glycerol is dehydrated and acrolein is formed.
Statement $II$: Acrolein has fruity odour and can be used to test glycerol's presence.
Choose the correct option.

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