The correct option is (c) Representative fraction
Easiest explanation: Representative fractions are a unit-less relation between one “unit” on the map and however many “units” of the same type on the ground. When a 1 cm long line in a drawing sheet represents 1 m length of the actual object on the ground, the R.F is equal to 1 cm/1 m = 1/100. These are of 3 types-full scale, reduced scale and enlarged scale.