Given below are two statements:
Statement $I$: Out of microwaves,infrared rays,and ultraviolet rays,ultraviolet rays are the most effective for the emission of electrons from a metallic surface.
Statement $II$: Above the threshold frequency,the maximum kinetic energy of photoelectrons is inversely proportional to the frequency of the incident light.
In the light of the above statements,choose the correct answer from the options given below:

• A
  Statement $I$ is true but Statement $II$ is false.
• B
  Both Statement $I$ and Statement $II$ are true.
• C
  Statement $I$ is false but Statement $II$ is true.
• D
  Both Statement $I$ and Statement $II$ are false.