The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is

Vertical if the soil is in a passive state of plastic equilibrium

Vertical if the soil is in an active state of plastic equilibrium

Inclined at 45° to the vertical plane

The major principal stress in an element of cohesion-less soil within

1.	The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is
A.	Vertical if the soil is in an active state of plastic equilibrium
B.	Vertical if the soil is in a passive state of plastic equilibrium
C.	Inclined at 45° to the vertical plane
D.	None of the above
Answer» B. Vertical if the soil is in a passive state of plastic equilibrium