Statement $I$: Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the positive centre and head pointing towards the negative centre.
Statement $II$: The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules.
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 correct.
• B
  Statement $I$ is incorrect but Statement $II$ is correct.
• C
  Both Statement $I$ and Statement $II$ are incorrect.
• D
  Statement $I$ is correct but Statement $II$ is incorrect.