Pick the correct statement A boundary layer is generated onl

Pick the correct statement A boundary layer is generated only when an invited fluid flows over a solid body viscous forces are significant in the boundary layer region of flow an ideal fluid exhibits the property of viscosity the boundary layer thickness is independent of the Reynolds number Fluid flow in a given region is treated as compressible if the density of the fluid is not constant in the region of the flow only if the flow Mach number M 0.3

Solution

Viscous forces are more significant in the boundary layer regime Re=p*v*l/m(B)

When mach no: grater than 0.3 Hence it is compressible