The incorrect statement regarding the downwash for a single horseshoe vortex in Prandtl’s lifting line theory is____

Downwash has contribution from trailing vortices

Downwash becomes infinite at the tips

Downwash is given by w=\(\frac {-\Gamma}{4\pi } \frac {b}{(\frac {b}{2})^2-y^2}\)

The contribution of two semi-infinite trailing vortices is same as an infinite vortex

The incorrect statement regarding the downwash for a single horseshoe

1.	The incorrect statement regarding the downwash for a single horseshoe vortex in Prandtl’s lifting line theory is____
A.	Downwash has contribution from trailing vortices
B.	Downwash becomes infinite at the tips
C.	Downwash is given by w=\(\frac {-\Gamma}{4\pi } \frac {b}{(\frac {b}{2})^2-y^2}\)
D.	The contribution of two semi-infinite trailing vortices is same as an infinite vortex
Answer» E.