Given below are two statements:
Statement-$I$: The scrotum helps in maintaining the low temperature of the testes.
Statement-$II$: Low temperature,compared to the normal internal body temperature,is necessary for spermatogenesis.
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 incorrect.
• B
  Statement-$I$ is incorrect but Statement-$II$ is correct.
• C
  Statement-$I$ is correct but Statement-$II$ is incorrect.
• D
  Both Statement-$I$ and Statement-$II$ are correct.