Assertion (A): It is all but impossible to design a practical fluid power system without some means of controlling the volume and pressure of the fluid.Reason (R): It is controlled and done by valves.

• A. tBoth A and R are true and R is not correct explanation of A.
• B. tBoth A and R are true but R is not correct explanation of A.
• C. tA is true but R is false
• D. tA is false but R is true