In the following figure,the flow of liquid through a horizontal pipe is shown. Three tubes $A, B$ and $C$ are connected to the pipe. The radii of the tubes $A, B$ and $C$ at the junction are respectively $2 \ cm, 1 \ cm$ and $2 \ cm$. It can be said that the:

• A
  Height of the liquid in the tube $A$ is maximum.
• B
  Height of the liquid in the tubes $A$ and $B$ is the same.
• C
  Height of the liquid in all the three tubes is the same.
• D
  Height of the liquid in the tubes $A$ and $C$ is the same.