The correct option is A Both magnitude and direction of velocity are constant
In fluid dynamics, laminar flow is characterized by fluid particles following smooth paths.
In a laminar flow, the streamlines are uniformly spaced, with no stream lines crossing each other at a given time.
The tangent drawn at a point on a streamline will represent the velocity (→v) of fluid particle. Hence, the magnitude and direction of fluid velocity will be constant at a given point on a streamline of fluid flow.