Assertion (A): Stream lines are drawn in the flow field such that at a given instant of time they are perpendicular to the direction of flow at every point in the flow field.
Reason (R): Equation for a stream line in a two dimensional flow is given by Vx dy – Vy dx = 0.
a. Both A and R are true and R is the correct explanation of A
b. Both A and R are 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 false