Compare the statements $A$ and $B$.
$Statement A$: Blood sugar level falls rapidly after hepatectomy.
$Statement B$: The glycogen of the liver is the principle source of blood sugar.
Select the correct description:

• A
  $Statement A$ is wrong and $B$ is correct.
• B
  Both the statement $A$ and $B$ are correct and $B$ is not the reason for $A$.
• C
  Both the statements $A$ and $B$ are correct and $B$ is the reason for $A$.
• D
  $Statement A$ is correct and $B$ is wrong.