What determines the magnitude of torque on a rigid body?
The magnitude of torque (τ = rFsinθ) depends on the force magnitude F and the perpendicular distance rsinθ from the pivot to the line of action of the force. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Force and perpendicular distance from the pivot. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.