Which temperature scale uses absolute zero as its starting point?
The Kelvin scale starts at absolute zero, the theoretical point where all molecular motion ceases, making it an absolute temperature scale. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Kelvin. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.