What distinguishes rolling motion from pure rotational motion?
Rolling motion combines translation (motion of the center) and rotation about an axis, while pure rotational motion involves only rotation about a fixed axis without translation. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Rolling motion combines translation and rotation. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.