Given below are two statements :
Statement-$I$: Sublimation is used for the separation and purification of compounds with low melting point.
Statement-$II$: The boiling point of a liquid increases as the external pressure is reduced.
In the light of the above statements,choose the correct answer from the options given below :

• A
  Statement-$I$ is false but Statement-$II$ is true
• B
  Statement-$I$ is true but Statement-$II$ is false
• C
  Both Statement-$I$ and Statement-$II$ are true
• D
  Both Statement-$I$ and Statement-$II$ are false