Pick out the wrong statement?

A. The form drag is dependent upon the occurrence of a wake

B. Existence of the boundary layer in fluid flow is because of viscosity of the fluid.

C. An ideal fluid is the one, which has negligible surface tension and obeys the Newtons law of viscosity

D. The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent) varies linearly as the radial distance

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