4. If the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, the flow is said to be
A. Steady flow
B. Turbulent flow
C. Laminar flow
D. Uniform flow
4. If the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, the flow is said to be
A. Steady flow
B. Turbulent flow
C. Laminar flow
D. Uniform flow