Q. The consistency index of a soil is defined as the ratio of

• (A) Liquid limit plus the natural water content to the plasticity index of the soil
• (B) Liquid limit minus the natural water content to the plasticity index of the soil
• (C) Natural water content of a soil minus plastic limit to the plasticity index of the soil
• (D) Natural water content of a soil plus its plastic limit to the plasticity index of the soil