Pick out the wrong statement.

The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonion fluids is $$\frac{\text{D}}{4\text{L}}\cdot \Delta \text{p}$$

In the equation, $$\tau \cdot {\text{g}}_{\text{c}}=\text{k}\cdot {\left(\frac{\text{du}}{\text{dy}}\right)}^{\text{n}}$$   the value of the value of 'n' for pseudoplastic and dilatant fluids are < 1 and > 1 respectively.

Shear stress for Newtonion fluid is proportional to the rate of shear in the direction perpendicular to motion