The correct answer is option 'D' - none of the above.

Explanation:
The ratio of liquid limit to plasticity index for a soil mass is not called liquidity index, shrinkage ratio, or consistency index. Let's understand each term individually:

1. Liquidity Index:
The liquidity index is a measure of the state of consistency of a soil. It is defined as the ratio of the difference between the liquid limit (LL) and the natural water content (w) to the plasticity index (PI). The formula for calculating the liquidity index is as follows:
Liquidity Index (LI) = (LL - w) / PI

2. Shrinkage Ratio:
The shrinkage ratio is a measure of the volumetric change that occurs in a soil sample when it goes from the liquid state to the solid state. It is defined as the ratio of the change in water content to the change in volume. The formula for calculating the shrinkage ratio is as follows:
Shrinkage Ratio = (w_initial - w_final) / (V_initial - V_final)

3. Consistency Index:
The consistency index is a measure of the consistency of a soil sample. It is calculated using the plastic limit (PL) and the liquid limit (LL) of the soil. The formula for calculating the consistency index is as follows:
Consistency Index = (LL - PL) / (LL - PL)

4. Ratio of Liquid Limit to Plasticity Index:
The ratio of liquid limit (LL) to plasticity index (PI) is not given a specific name. It is simply the ratio of the two values and represents the relationship between the upper and lower limits of the plastic range of a soil. The liquid limit is the moisture content at which a soil changes from a plastic to a liquid state when a specified amount of shearing force is applied. The plasticity index is the numerical difference between the liquid limit and the plastic limit and represents the range of moisture content over which the soil remains plastic.

In conclusion, the ratio of liquid limit to plasticity index for a soil mass does not have a specific name and is not referred to as the liquidity index, shrinkage ratio, or consistency index.