Given below are two statements:
Statement $I$: Photovoltaic devices can convert optical radiation into electricity.
Statement $II$: Zener diode is designed to operate under reverse bias in the breakdown region.
In the light of the above statements,choose the most appropriate answer from the options given below:

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