Given below are two statements:
Statement-$I$: In an $AC$ circuit,the current through a capacitor leads the voltage across it.
Statement-$II$: In $AC$ circuits containing pure capacitance only,the phase difference between the current and the voltage is $\pi$.
In the light of the above statements,choose the most appropriate answer from the options given below:

• 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.