What is the effect of a force applied at the axis of rotation on a rigid body?
A force applied at the axis (r = 0) produces no torque (τ = rFsinθ = 0), so it cannot cause rotation about that axis. As per NCERT, applying relevant law/formula with correct units and sign convention leads to It causes no rotation. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.