Correct option is A
The force required to drag a body when it is just impending to move on an inclined plane is given
by W tan(α + ϕ)
where:
W is the weight of the body,
α is the angle of the inclined plane,
ϕ is the angle of friction.
This equation accounts for both the inclination of the plane and the frictional resistance that must be overcome to initiate motion.
