Given below are two statements:
Statement $I:$ Noradrenaline is a neurotransmitter.
Statement $II:$ Low level of noradrenaline is not the cause of depression in human.
In the light of the above statements,choose the correct answer from the options given below.

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