Which of the following is $NOT$ true for $Reserpine$?

• A
  $Reserpine$ is an alkaloid.
• B
  $Reserpine$ is also known as $Serpasil$.
• C
  $Reserpine$ can be obtained from the $Rauwolfia \text{ } serpentina$ plant.
• D
  $Reserpine$ is not a tranquilizer.