The unit of ratio is expressed in terms of
kg
gram
metre
None of these
Ratio comprises of similar types of quantities so the units cancel out each other and thus there is no unit for a ratio.
The unit of ratio is expressed as none.
Hence, option D is correct
For comparing two quantities in terms of ratio, the quantities must be expressed in same unit.
A unit which may be expressed in terms of other units by multiplication and division is known as _____.