Assertion (A): The velocity potential provides an alternative means of expressing velocity components.
Reason (R): The existence of velocity potential in a flow field ensures that the flow must be irrotational
(A) Both A and R are individually true and R is the correct explanation of A
(B) Both A and R are individually true but R is NOT the correct explanation of A
(C) A is true but R is false
(D) A is false but R is true