Lincoln index is used to measure

Identify the following statements as true $\left(\mathrm{T}\right)$ or false $\left(\mathrm{F}\right).$

A. Tiger census in our national parks is often based on pug marks and faecal pellets.

B. Size of population for any species is not a static parameter.

C. Per cent cover or biomass cannot be a meaningful measure to known population density.

D. Population density is necessarily measured in numbers.