Liquid Ratio is used for which kind of soils?

Answer: Option C

The liquidity ratio is the ratio of the difference between natural water content, plastic limit and liquid limit. It is used for scaling the natural water content of a soil sample to the limits. It is used in the classification of the soil and it gives an idea about the plasticity of the soil.
The liquid ratio is used for soils where soil volume is not constant and for swelling soil.