Statement-$1$ : Cephalochordata bears notochord all along the body throughout life.
Statement-$2$ : Urochordate bears vertebral column only in tail region throughout the life.
Then which is correct?

• A
  Both statement-$1$ and statement-$2$ are correct
• B
  Statement-$1$ is correct,statement-$2$ is wrong
• C
  Statement-$1$ is wrong,statement-$2$ is correct
• D
  Both statement-$1$ and statement-$2$ are wrong